Maryport on Wikipedia.
 

All Souls on Ashby Street and George Terrace, Netherton, originally a chapel of ease to Dearham. NY 0440 3602. © Steve Bulman.

Brow Street chapel (now demolished); the view from Brow Street; the pulpit; and the pews. NY 0349 3668. All © Peter Ostle.

Mortuary Chapel in Maryport cemetery at NY 0521 3829. It was originally the chapel for Nonconformists; the demolished CoE chapel was a little way to the south at NY 0520 3820. © Steve Bulman.

Christ Church (1872) on King Street, by the harbour. NY 0341 3665. © Steve Bulman. Another view, © Alan Blacklock. It was announced in 2013 that the church has had to be closed because of spiralling repair costs - news item here. News item (2019). News item (2020) about its deteriorating condition. Link.

Furnace Road Gospel Hall. It's marked on older maps as a Baptist Chapel. NY 0361 3643. © Steve Bulman.

Kingdom Hall of Jehovah's Witnesses on Pecklewell Lane. NY 0453 3575. © Steve Bulman.

Methodist Chapel on Church Terrace, Ellenborough. According to this source, it was closed by 2016. NY 0456 3588. © Steve Bulman.

Methodist Chapel, Netherton. NY 043 361. © Steve Bulman.

Our Lady and St. Patrick (R.C.) on Crosby Street. NY 036 367. © Steve Bulman.

St. Mark's Methodist Church on Kirkby Street, as seen by the Streetview van in 2011. It's dated here to 1973. Link.

St. Mary (1847). NY 0380 3661. © Steve Bulman. Link. Grade II listing, which says that the church was originally built in 1760. The present building is substantially of the re-builds of 1847 (of which the tower survives) and 1892.

The Salvation Army commenced in Maryport in 1886, and initially used the Temperance Hall, Athenaeum, and Co-operative Hall, before moving into what had previously been a Presbyterian Chapel on John Street in 1892, and remained there until 1959 at least, as Maryport Temple. © Salvation Army Philatelic and Historical Society (SAPHA). Can you advise if any of the other buildings survive, or where they were?

Trinity Baptist Church. NY 037 363. © Steve Bulman. Another view, © Alan Blacklock. Link.

Possible old church, which I'm advised is now a Masonic Hall. NY 036 368. © Steve Bulman. Janet Gimber has advised that, although not a chapel, the Masonic Hall stands on the site of a Baptist Chapel. It had a Sunday School behind, and to judge from old map evidence, that building may have been incorporated into the present building.