The Old Scotch Church, also known as the Tualatin Plains Presbyterian Church, is a church and national historic site located in an unincorporated part of Washington County, Oregon, near Hillsboro, Oregon, United States. The church dates to 1873 while the church structure with an eight-sided steeple dates to 1878. A cemetery on the church grounds holds the graves of church members and local pioneer settlers of the Tualatin Plains, including Joseph Meek.