Mountain Police is a subtheme of City that was introduced in 2018 and currently consists of 9 sets. As of today, the average annual growth of all the sets in City Mountain Police is around 3.6% per year.
The LEGO Mountain Police is a Police-based City subtheme introduced in 2018 that feature Police sets that take place in the mountains.
The LEGO City theme is based on city life with the sets depicting city and emergency services, police, fire, airport, train, construction, and civilian services. The City theme proceeded LEGO Town which was replaced with LEGO World City in before it was rebranded as City in 2005.