Clackmannanshire on Wikipedia.

Alloa.
Alva, the surviving lowest courses of St. Serf, as seen by Streetview in 2009. The remains are of the 17th century church (this source says 1631) - there were earlier churches on the site. According to a news story it was burned down in a fire in 1984 (it had been redundant since 1980) and was demolished in 1985. Some photos of it can be seen here. The mausoleum seen in the Streetview is category A listed. The present parish church (2023 Streetview) is on Stirling Street and was built as United Presbyterian in 1842 (later known as Eadie Church). NS 8817 9703. Link. Baptist Church on Brook Street, as seen by Streetview in 2023. Another Streetview from 2009, and another from 2021. It pre-dates a map of 1901, and it seems to be the same building shown on a map of 1866 as a school. This source confirms it - sold to the Baptists in 1883, and converted to a church in 1907. NS 8836 9712. Link. The former Free Church (2021 Streetview) of 1843 on West Stirling Street. A 2009 Streetview suggests that it had already been converted to residential use by that date. NS 8805 9703. St. John Vianney (R.C., 1925-6, source) on East Stirling Street. It was seen by Streetview in 2009. NS 8868 9704. Link.

Clackmannan, the Kirk (CoS) on High Street, as seen by Streetview in 2023. NS 9099 9184. Link, with a history here. Category B listed, wherein it's dated to 1815, though it stands on an ancient site. A former Free Church (2023 Streetview), later United Free, stands between Alloa Road, Kirk Wynd and Mayfield Crescent. It's mentioned on the history page of the Kirk as dating from 1843. It's now a Masonic Hall. NS 9103 9213. The site of a demolished United Presbyterian Church (originally a Relief Church, of 1788), as seen by Streetview in 2023. It stood on North Back Street and Kirk Place, and large scale maps show it to have had an interesting shape - a sort of stretched octagon. A map of 1956, revised in 1946, show that it had been demolished by then. NS 9110 9197. A little way south of the town is a property called Chapelhill, and to its south is Chapel Well. This source mentions a Chapel Site at NS 9129 9127, saying that there may have been visible remains in the 1930's. There's nothing further. The grid ref. points to the middle of the field seen in a Streetview from 2009. Link.
Coalsnaughton, the former United Presbyterian Church (2023 Streetview) on Ramsay Street. It's dated here to the late 1880's. Another view, also from Streetview in 2023. NS 9200 9570.

Dollar, the Parish Church (CoS) on Manse Road. NS 9641 9802. © Alex Parker. Link. Category B listed wherein its dated to 1841, by Tite. The roofless remains of the Old Parish Church stand a little way north at NS 9637 9809. Not well seen by Streetview in 2021, some photos can be seen on its Canmore entry. Category B listed. East Burnside Church Hall (for the Parish Church) on East Burnside was formerly a United Presbyterian Church. Its very brief category C listing dates it to circa 1842. NS 9634 9805. © Alex Parker. A former Free Church stands on Harviestoun Road at NS 9588 9790. Its category C listing, which calls it West Church, dates it to circa 1870. It was for sale when seen by Streetview in 2023. St. James the Greater (Episcopal) stands further west on Harviestoun Road and Mylne Avenue at NS 9579 9802. It was seen by Streetview in 2023. Link. Its category C listing just dates it to the late 19th century - Genuki says it was "founded in 1882".

Fishcross, the site (2021 Streetview) of a church shown (but not otherwise identified) on maps of the early 20th century. NS 8990 9540.

Menstrie, the Kirk on Main Street East, as seen by Streetview in 2023. NS 8497 9645. Link. Early 20th century maps show a U.P. Mission Hall at the western edge of the village at NS 8454 9694. Today it's Menstrie United Free Church of Scotland, and it was seen by Streetview in 2023. Link.

New Sauchie, Sauchie and Coalsnaughton Parish Church (2023 Streetview) on Main Street. Its Category C listing dates it to 1841-2, although this source says that in "1835, a church was already under construction in Sauchie". NS 8972 9451. Sauchie and Fishcross United Free Church (2015 Streetview). It stands on Church Grove at NS 8908 9399. Link.

Pool of Muckhart, Muckhart Parish Church (CoS). It's dated to 1838 in its category B listing. NO 0007 0097. © Martin Briscoe. Link.

Tillicoultry.
Tullibody, St. Serf on Menstrie Road, as seen by Streetview in 2023. Its category B listing dates it to 1904. NS 8604 9539. Link. It replaced the medieval St. Serf, the roofless shell of which stands a short distance to the south, at NS 8603 9531. It can be seen in a 2015 Streetview, with the Free Church behind. The former Free Church (2015 Streetview) on Menstrie Road. From old maps it appears to have gone out of use in the first half of the last century - this source suggests dates of 1843-1927. NS 8603 9528. St. Bernadette (R.C.) on Baingle Brae, as seen by Streetview in 2023 and in 2021. NS 8570 9513. Link.