The Oak Hill Welsh Congregational Church is a historic former church in the village of Oak Hill, Ohio, United States. It was originally home to a congregation of Welsh immigrant miners, and it has been named a historic site. The church building is a brick structure with a tin roof and foundation of sandstone. Its primary builders, Isaac Parry and Thomas Herbert, produced a Greek Revival structure; although just one story tall, it features a bell tower atop the roof. The building as a whole is a simple rectangle, although the bell tower is octagonal.