Essex on Wikipedia.

Abbess Roding, St. Edmund. From an old postcard (franked 1911) in Reg Dosell's Collection. Link.
Aldham, St. Margaret and St. Catherine. From an old postcard in Reg Dosell's Collection. Link.
Alphamstone, St. Barnabas. Three interiors - 1, 2, 3, a window, and the font. All © Chris Stafford (2013). Link. Grade I listed.
Alresford, the ruins of St. Peter, burnt down in a fire in 1971. The churchyard is still in use. The church was replaced  - St. Andrew and St. Peter. TM 068 213. Both © Les Needham.
Arkesden, St. Mary the Virgin. Another view. TL 482 345. Both © Barry Mace. Link.
Ashen, St. Augustine of Canterbury. © Chris Stafford (2013). Link. Grade I listed.

Barking, St. Margaret. A rather heavily processed old postcard in Steve Bulman's Collection. Link.
Barling Magna, All Saints. TQ9389. © Julieanne Savage.
Basildon.
Belchamp Otten, St. Ethelbert and All Saints. Three additional views - 1, 2, 3. TL 8033 4176. All © Roger Heap (2015). The porch doorway, two interior views - 1, 2, the altar, and the font, all © Chris Stafford (2013). Link. Grade I listed. An Independent Chapel (later Congregational) is labelled on old O.S. maps at TL 8009 4168. It pre-dates the earliest map available to me (1876), and seems to have been closed before 1957. The site of the chapel and adjoining burial ground, which has been redeveloped for housing, can be seen in this 2009 Streetview. I've been unable to find a photo, or any substantial information, about this chapel.
Belchamp St. Paul, St. Andrew, which stands about a mile N.N.E. of the village, at TL 7983 4346. Three interior views - 1, 2, 3, the altar, one of the many fine bench-ends, and the font. All © Chris Stafford (2013). Link. Grade I listed.
Belchamp Walter, St. Mary the Virgin. Three additional views - 1, 2, 3. TL 8273 4069. All © Roger Heap (2015). Link. Grade I listed.
Benfleet, Holy Family Church (R.C.). © Mark Summers. Link.
Berden, St. Nicholas. Another view, a fine window, two interior views - 1, 2, and the font. TL 4677 2963. All © Chris Stafford (2013). Link. Grade I listed. The 25" O.S. map of 1897 marks a Wesleyan Methodist Chapel at TL 4694 2985. The chapel pre-dates a map of 1876-7, and the latest map to show it which I can find is dated 1960. A map of 1978 shows a Hall on the same site, and it can be seen here on a Streetview of 2009. It seems to have roughly the same footprint, so perhaps all or part of the chapel survives, in what is now the village hall.
Birdbrook, St. Augustine. Another view. TL 7067 4115. Both Karel Kuča (2019). More photos are available here and here. Grade II* listed.
Blackmore, Priory Church of St. Lawrence. © Alan Wilson.
Bocking, St. Mary the Virgin. As can be seen from the church website, the tower finials have been reduced or removed since this postcard was published. From an old postcard, Geoff Watt's Collection. Link.
Borley, dedication unknown or lost. © Mark Turbott. Another view, and the tower and porch, both © Chris Stafford (2013). Grade I listed.
Bowers Gifford, St. Margaret of Antioch. TQ 755 872. © Mark Summers. Two additional views 1, 2, both © William Metcalfe. This church has also appeared in the "Unknown" section, original entry as follows - "John James has an old family photo, and the people in the photo all lived in Monmouthshire, in the Abertillery/Llanhilleth area. Can you identify the church?" My appreciation to Greg Mishevski and Brian Curtis for the identification, and for not being misled by the Welsh clue! Link. The Church at Gun Hill. Link. © Mark Summers.
Bradwell-juxta-Coggeshall, Holy Trinity. Two further views - 1, 2, and the wooden porch. All © Roger Heap (2012). Link. Grade I listed - link.
Bradwell-on-Sea, St. Peter-on-the-Wall. This is a remarkable survival (the nave of a once-larger church), dating from the 7th century, and is in regular use. Interior view. Both © Iris Maeers. Link. Grade I listed. St Thomas the Apostle, © Tim Flitcroft (2014). Link. Grade II* listed.
Brentwood.
Broxted, St. Mary the Virgin. Three interior views - 1, 2, 3, a side chapel, the fine flat-carved pulpit, and a modern font. Two windows commemorate the travails of the hostage John McCarthy - a mostly grey one "Hostage", and a mostly blue one "Freedom". All © Chris Stafford (2012). Link. Grade II* listed - link.
Bulphan, St. Mary the Virgin. Interior view. TQ 636 858. Both © Dave Westrap. Two old postcard views, exterior (franked 1907) and interior (of approximately the same date), both from Dave Westrap's Collection. Link1. Link2. Zion Hall Interdenominational Chapel. TQ 639 859. © Dave Westrap.
Burnham-on-Crouch, St. Mary the Virgin. © Bill McKenzie. Jan Bradley had sent me some scans of old stereoviews. This one was identified by Phil Draper. Phil was able to date one of the others as being of pre-1873 vintage, so this one is probably of a similar date. Link. Grade II* listed. Burnham Baptist Church (1904) on High Street. TQ 950 957. Another view, and the foundation stone. All © Steve Taylor. Link.
Buttsbury (near Ingatestone), St. Mary. Another view. Interior view. TQ 663 986. All © William Metcalfe. Link.

Canewdon, St. Nicholas. Two additional views - 1, 2. All © Roger Heap (2015). Link. Grade II* listed.
Canvey Island.
Chelmsford.
Chipping Ongar, St. Martin. Another view. Both © Bill McKenzie.
Chrishall, Holy Trinity. © Marion Hall. Link. Grade I listed - link.
Churchend, on Foulness Island. Rebuilt in 1848. Much of the island is under the Ministry of Defence, so access is limited. TR 0093. © Julieanne Savage.
Clacton-on-Sea, St. John the Baptist at Great Clacton. From an old postcard in Steve Bulman's Collection (franked, 1905). Link.
Clavering, St. Mary and St. Clement. © Marion Hall. Link. Grade I listed - link.
Coggeshall, St. Peter ad Vincula on Church Green. Another view, two interiors - 1, 2, a side chapel, and the font. The church has some good wood carvings. TL 8535 2302. Link. Grade I listed. Christ Church on Stoneham Street. TL 8499 2274. Link. Wesley Hall, also on Stoneham Street, appears to be the hall for Christ Church, but was presumably a Wesleyan Methodist Church at some point. Circa TL 84965 22670. Old Chapel on Church Street was Baptist (as shown on map of 1875), and had been opened in 1855. It was preceded by an earlier chapel of 1829, also on Church Street, so perhaps on the same site. Prior to this, the congregation, formed at least as early as 1745, met in private houses. TL 8514 2271. The Catholic Church of St. Bernard of Clairvaux on Stoneham Street. TL 84965 22768. Link. The former Friends' Meeting House (1878) on Stoneham Street is now the library. It stands on the site of an earlier Friends' Meeting House, which, according to the plaque, was purchased in 1673, and so presumably a pre-existing building. TL 84946 22729. An unusual entry for this website is the Woolpack Inn on Church Street. The plaque provides the explanation. TL 85312 22944. All © Steve Bulman (2016).
Colchester.
Coopersale, St. Alban. From an old postcard in Steve Bulman's Collection. Link.
Cornish Hall End, St. John the Evangelist (1841, C). © Chris Stafford (2013). Link.
Corringham, St. Mary the Virgin. © Mark Summers. Link.

Dedham, St. Mary the Virgin. © Steve Bulman. Another view of St. Mary. © Judith Anderson. Interior view, © John Balaam (2008). The former U.R.C., now a craft centre (thanks to Les Needham for advising the former denomination). © Steve Bulman.

Duddenhoe End, The Hamlet Church. It was originally a tithe barn, but consecrated in 1859. Another unusual feature (which obviously wasn't an issue when it was built) is its orientation, running roughly N-S rather than the traditional E-W. TL 4615 3722. Another view, two of the interior - 1, 2, and the font. All © Chris Stafford (2013). Link.

East Horndon, All Saints, is now in the care of the Churches Conservation Trust, but still holds occasional services. The graveyard is still in use. A 2008 Streetview provides another viewpoint (later views are even more hampered by vegetation). TQ 6355 8952. Photo © Brian Thompson. Additional information kindly supplied by Linda Golding. News item regarding disgraceful events here in 2020. The grade II* listing has more photos.
Eastwood, St. David. TQ 8289. © Julieanne Savage. Link.
Epping, St. John the Baptist (interior). From an old postcard in Steve Bulman's Collection. Link. Grade II* listed.

Fairstead, St. Mary the Virgin and St. Peter. From an old postcard in Geoff Watt's Collection. Link.
Farnham, St. Mary the Virgin. It's grade II listing dates it to 1859, built on the foundations of its predecessor. Three further views - 1, 2, 3. TL 4814 2480. All © Chris Stafford (2013). Link.
Fobbing, St. Michael. © Mark Summers. The following are all © Jack Nicholson - another view, and another, the porch, Link.
Foxearth, St. Peter and St. Paul (C). Another view. TL 836 448. Both © Janice Tostevin. Link.
Frinton. Thanks to Dave Westrap for identifying this church as St. Mary the Virgin, and for providing the links at the end of the entry. From an old postcard, Geoff Watt's Collection. Previously in the "Unknown" section, John Bowdler's photo taken some years ago was identified by Janet Gimber and Simon Davies. Link1. Link2. Link3.
Fryerning, St. Mary the Virgin. © Alan Wilson. Link. Mill Green Gospel Hall, photographed in 1993. © Alan Taylor.

Grays, Bethel Full Gospel Church at South Stifford. © Alan Taylor.
Great Bardfield, St. Mary the Virgin. © Chris Stafford (2013). Link. Grade I listed.
Great Dunmow, St. Mary the Virgin. TL 630 220. Link1. Link2. Grade I listed. Our Lady of St. Anne Line (R.C.). TL 630 230. Link. U.R.C. TL 629 217. All © Les Needham (2013).
Great Easton, St. John and St. Giles. TL 608 255. © Les Needham (2013). Link. Grade II* listed.
Great Hallingbury, dedicated to St. Giles. 167 TL 512 196. © Robert Mather. An old postcard view, from Reg Dosell's Collection.
Great Wakering, St. Nicholas. TQ 9487. © Julieanne Savage.
Great Warley - see Baildon, West Yorkshire. Greensted, St. Andrew. Dating from 1060, it's the only surviving Saxon church, and supposedly the oldest wooden building anywhere. © Bill McKenzie. Another view. From an old postcard (franked 1906), Bulman Collection.
Great Yeldham, St. Andrew. Another view, and two of the interior - 1, 2. TL 7578 3866. All © Chris Stafford (2013). Link. Grade I listed. Hope Strict Baptist Chapel stands just off the main road to the south at TL 7615 3789. A photo can be seen here, wherein it's dated to 1875.

Hadleigh, St. James the Less. From an old postcard, Geoff Watt's Collection. Link.
Hadstock, St. Botolph. From an old postcard in Reg Dosell's Collection.
Hatfield Broad Oak, St. Mary the Virgin. Another view. Both from old postcards in Reg Dosell's Collection. Link.
High Ongar, St. Mary. © Alan Wilson.
Horndon-on-the-Hill, St. Peter and St. Paul. © Brian Thompson. Two views © Roger Heap, 1, 2. Link.
Hutton, All Saints. © Bill McKenzie. Another view, © Karel Kuča (2007).

Laindon, St. Nicholas. © Brian Thompson. An old postcard view, from Reg Dosell's Collection.
Lamarsh, Holy Innocents. From an old postcard in Reg Dosell's Collection, which was faded, and had to be heavily processed to improve the image quality. Link.
Langdon Hills, Basildon.
Langford, St. Giles. Another view. Both © Steve Taylor. Link.
Langley, St. John the Evangelist (C) on The Causeway. Two additional views - 1, 2. There is a Norman door with simple roll-moulding. Interior view, through a window. All © Chris Stafford (2013). Grade II* listed.
Lawford, St. Mary. The porch, and an interior view. All © John Bowdler. Link.
Leigh-on-Sea.
Liston, no dedication or dedication lost (C). Another view, and the porch. All © Chris Stafford (2013). Link1, which suggests the dedication may have been St. Katherine. Link2. Link3.
Little Wakering, All Saints. TQ 9388. © Julieanne Savage.
Little Yeldham, St. John the Baptist. Two interior views - 1, 2. TL 7792 3956. All © Chris Stafford (2013). Link. Grade II listed.

Maldon.
Manuden, St. Mary the Virgin. TL 4910 2666. © Nadine Pedley. Two additional views - 1, 2, four views of the interior - 1, 2, 3, 4, and the font. All © Chris Stafford (2013). Link. Grade II* listed.
Middleton, All Saints. Previously in the "Unknown" section, this postcard (franked 1905), is from Judy Flynn's Collection. Brian Curtis, Simon Davies, Janet Gimber and Greg Mishevski all rapidly identified it, providing the following information and links. A photo of the church in 1895 (with less greenery), a drawing from the 1940's. The spire was subsequently removed in the 1950's, when other restoration work was carried out (link, see page 5, para 4). Church Plans On-line says that an application for a grant was made in 1951, so the spire was perhaps removed in the early 1950's. A modern photo. Link. Grade I listed - link.
Mount Bures, St. John the Baptist. © Roger Heap.
Mundon, St. Mary (redundant). © Iris Maeers. Link. Grade I listed.

Navestock, St. Thomas the Apostle. © Peter Hobday.
Newport, St. Mary the Virgin. © Marion Hall. Link. Grade I listed - link.
Noak Hill, St. Thomas. TQ 541 940. © Peter Hobday.
North Ockenon, St. Mary Magdalene. TQ 587 848. © Peter Hobday.
North Shoebury, St. Mary the Virgin. TQ 9286. © Julieanne Savage. An old postcard view, from Reg Dosell's Collection. Link.
North Stifford, St. Mary. © Mark Summers. Link.

Orsett, St. Giles & All Saints. © Brian Thompson.
Ovington, St. Mary (C). Another view. Both © Chris Stafford (2013). Link1. Link2. Grade II* listed.

Paglesham, St. Peter. © Roger Heap (2015). Link. Grade II* listed.
Pentlow, St. George and St. Gregory. © Elizabeth Orbell. Link.
Pitsea, the remains of St. Michael. © Mark Summers.
Prittlewell, St. Mary the Virgin, has some fragments from as early as the 11th century, but is mostly 15th century. © Brian Thompson. Another view from an old postcard in Steve Bulman's Collection.

Quendon, St. Simon & St, Jude (K), undergoing refurbishment. Another view. Both © Chris Stafford (2013). Link. Grade II* listed.

Radwinter, St. Mary the Virgin. From an old postcard in Steve Bulman's Collection. The postcard was badly faded, and has hence been heavily processed to recover as good an image as possible.
Rawreth, St. Nicholas, a re-build of 1882. © Brian Thompson.
Rayleigh.
Rivenhall, St. Mary and All Saints on Church Road. The tower. TL 828 178. Both © Steve Taylor. Link.
Roydon, St. Peter. From an old postcard in Reg Dosell's Collection. Link.

Saffron Walden, St. Mary the Virgin. From an old postcard (franked 1904) in Steve Bulman's Collection. Link.
St. Osyth, the gatheouse of the Priory, now a private residence. From an old postcard in Steve Bulman's Collection. Link.
Sewards End, St. James (1870-1). Interior view (taken through a window). Both © Chris Stafford (2013).
Shoeburyness, St. Andrew. From an old postcard, Geoff Watt's Collection. Link.
Silver End, St. Francis, on Boars Tye Road. Another view. TL 810 197. Link. St. Mary (R.C.) on Sheepcotes Lane. Another view. TL 810 200. Link. Silver End Congregational Church on Silver Street. Another view. TL 805 198. Link. All © Steve Taylor.
South Benfleet.
South Ockendon, St. Nicholas. TQ 594 829. © Neil Davies. Two other view, both © Jack Nicholson. 1, 2. Link1. Link2 (towards bottom of the page). Wesleyan Church (1847). © Jack Nicholson.
Southchurch, Holy Trinity. According to its web-site, the church was extended in the early years of the 20th century. The picture on this web-site would appear to date to before the modern works began. It's postmarked 1905. From an old postcard, Steve Bulman's Collection.
Southend-on-Sea, St. Laurence and All Saints at Eastwood. © Geoff Watt. Link.
Stanford-le-Hope, St. Margaret of Antioch, of Norman foundation, restored in Victorian times, it still retains much earlier stonework, and some fine carvings. Tombs and monuments of the Fetherston and Scratton families. © Brian Thompson.
Stansted Mountfitchet, St. Thérèse of Lisieux (R.C., 2002). An additional view. Both © Chris Stafford (2013). Link.
Steeple, St. Lawrence and All Saints. From an old postcard in Reg Dosell's Collection.
Stock, All Saints. From an old postcard, Reg Dosell's Collection. Compare with the photo of bomb damage in WWII on this link.
Strethall, St. Mary the Virgin. © Marion Hall. Link. Grade I listed - link.

Thaxted, St. John the Baptist, Our Lady and St. Laurence. TL 610 310. From an old postcard in  Christopher Skottowe's Collection. A modern view, and the porch, both © Les Needham (2013). Link. Grade I listed. Baptist Church (1833). TL 612 308. © Les Needham (2013). Link. U.R.C. TL 609 310. © Les Needham (2013).
Theydon Mount, St. Michael. TQ 492 992. © William Metcalfe. Link.
Thundersley.
Tillingham, St. Nicholas. TL 993 038. © Tony Preston. "Peculiar People" Chapel (1858). © Iris Maeers. Link.
Tilty, St. Mary the Virgin. TL 600 264. © Les Needham (2013). Link. Grade I listed.
Toppesfield, St. Margaret of Antioch. Wooden porch. TL 739 374. Both © Steve Taylor.

Vange, All Saints. © Mark Summers. Link.

Waltham Abbey, the Parish Church of Waltham Holy Cross. Not the Abbey, as this has always been the parish church. The adjacent abbey was a victim of Henry VIII, but the parish church was unmolested. Originally a church was dedicated here in 1060 by the later King Harold. The core of present church has more or less the same footprint. Two further views - 1, 2, and an interior view, all © Christopher Skottowe (1964). Christopher Skottowe has an old album containing (among other things) a sketch of a church, which has previously been in the Unknown section. Though there's no indication of the date of the sketch, it is probably from late Victorian times. Simon Davies has identified it as Waltham Abbey in Essex, before Victorian alterations increased the height of the tower. Two additional views - 1, 2, interior view, the altar, and a fine monument. King Harold is allegedly buried here - a stone marks the site. All © Peter Morgan (2015). Link1. Link2. An old engraving of the church can be seen here and (coloured) here.
Walton-on-the-Naze, All Saints on Church Road. An interior view, and the East window. Link. Grade II listed. Pentecostal Church on High Street. All © John Balaam (2019).
Warley - see Brentwood.
Wennington, St. Mary & St. Peter. TQ 539 809. © Peter Hobday. Link.
West Bergholt, St. Mary Old Church - no longer in use (redundant in 1975), and now in the care of the Churches Conservation Trust. © Roger Heap. St. Mary (the new church). Another view. Both © Roger Heap (2011). Grade I listed - link. Link (for both churches).
West Hanningfield, St. Mary and St. Edward. Another view. TQ 735 998. Both © William Metcalfe. Link.
West Horndon, St. Peter, as seen by the Streetview van in 2009. Better images are available on Geograph, here. TQ 6044 8864. Grade I listed.
Westcliff on Sea, U.R.C. © Brian Thomson.
Wicken Bonhunt, St. Margaret. Another view, three interiors - 1, 2, 3, the pulpit and the font. All © Chris Stafford (2013). Link.
Wickham Bishops, St. Bartholomew. Another view. TL 837 120. Both © Steve Taylor (2010). Link.
Wickham St. Paul's, All Saints (K). Four further views - 1, 2, 3, 4. All © Roger Heap. Link. Grade II* listed - link.
Witham, Rickstones Evangelical Church on Rickstones Road. TL 820 159. © Steve Taylor. Link.
Wivenhoe, St. Mary the Virgin. TM 039 215. © Les Needham. Link.
Woodham Mortimer, St. Margaret, on Maldon Road. Another view. TL 822 052. Both © Steve Taylor (2011).
Wormingford, St. Andrew. Another view. Both © Roger Heap. Link. Grade I listed - link.
Writtle, All Saints. Link. U.R.C. Both © Geoff Watt.