Westminster Presbyterian Church is a congregation and building in Dayton, Ohio. The 1926 building was designed by Ralph Adams Cram and was added to the National Register of Historic Places in 2021. The congregation was established in 1799 and was the first church formed in Dayton. Today the congregation boasts over 1000 members and holds regular services each Sunday along with many additional musical and religious events throughout the year.

Dayton is a city in and the county seat of Montgomery County, Ohio, United States. A small part of the city extends into Greene County. As of the 2020 census, the city proper had a population of 137,644, making it the sixth-most populous city in Ohio. It anchors the state's fourth-largest metropolitan area, the Dayton metropolitan area, which had 814,049 residents. Dayton is located within Ohio's Miami Valley region, 50 miles (80 km) north of Cincinnati and 60 miles (97 km) west of Columbus.