St Mary's Church is in the village of Eccleston, Cheshire, England, on the estate of the Duke of Westminster south of Chester. The church is recorded in the National Heritage List for England as a designated Grade I listed building. It is an active Anglican parish church in the diocese of Chester, the archdeaconry of Chester and the deanery of Chester. Its benefice is combined with that of St Mary, Pulford. The Dukes of Westminster are buried in the adjacent Old Churchyard.

Eccleston is a village and former civil parish, now in the parish of Eaton and Eccleston, in the borough of Cheshire West and Chester, in the ceremonial county of Cheshire, England. The village is approximately 2.7 miles (4.3 km) to the south of the city of Chester, near to the River Dee. The village is situated on the estate of the Duke of Westminster who maintains his ancestral home at nearby Eaton Hall.