Westminster is a city in Carroll County, Maryland, United States. The population was 16,731 at the 2000 census. It is the county seat of Carroll County. Westminster is within the Baltimore-Washington Metropolitan Area. Westminister is a partner city with Paide, Estonia. Westminster is the home of McDaniel College, the Carroll County Fair, Common Ground on the Hill, and the Maryland Wine Festival. Westminster apartments for rent comparison page shows most up to date rent information on Westminster apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.