Westminster is a Home Rule Municipality in Adams and Jefferson counties in the U.S. state of Colorado. Westminster is a north ... west suburb of Denver. The Westminster Municipal Center is located 9 miles (14 km) north-northwest of the Colorado State Capitol. As of the 2010 census the population of Westminster was 106,114,[7] and as of 2019 the estimated population was 113,166.[8] Westminster is the seventh most populous city in Colorado and the 237th most populous city in the United States. Westminster is a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and the Denver-Aurora-Boulder Combined Statistical Area. read more