St John's Kirk, Lochwinnoch

St John's Kirk, also known as St Winnock's Church and, colloquially, Auld Simon (Old Simon), is a former church building in Lochwinnoch, Renfrewshire, Scotland. It dates to 1729, and is now Category B listed. 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.

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