St John's Kirk, also known as St Winnock's Church and, colloquially, Auld Simon (Old Simon),[1] is a former church building in Lochwinnoch, Renfrewshire, Scotland.

It dates to 1729, and is now Category B listed.

[1] Only the southwest gable and a single bay of the structure remains, the rest likely torn down around the date the new church was constructed in 1808.

[1] The church is surrounded by a walled cemetery, which is also part of the listing.

[1] This article about a church building or other Christian place of worship is a stub.