Cirencester Parish Church, also known as the Church of St. John the Baptist, is a historic church located in the town of Cirencester, Gloucestershire, England. The church dates back to the 12th century and features a mix of architectural styles, including Norman, Gothic, and Perpendicular. It is one of the largest parish churches in England, with a nave measuring 150 feet in length.

The church has a rich history and has played a significant role in the town's development. It was once the site of a Roman temple and later became a Saxon church. The Normans built a stone church on the site in the 12th century, which was later expanded and rebuilt in the Gothic style in the 14th and 15th centuries. The church also served as a place of worship for the wool merchants who were a prominent part of Cirencester's economy during the medieval period.

One of the most notable features of the church is the 15th-century perpendicular tower, which rises to a height of 130 feet and is visible from miles around. The tower has eight bells, the oldest of which dates back to 1625. The church also features an impressive collection of stained glass windows, including a series of windows depicting the life of Christ.

Cirencester Parish Church is still an active place of worship, with regular services held throughout the week. Visitors are welcome to explore the church and its grounds, which include a beautiful walled garden and an ancient yew tree that is believed to be over 1,500 years old. The church is also home to a museum, which displays a collection of artifacts and documents that tell the story of Cirencester's history.