Montgomery County is the third-most populous county in Pennsylvania, and the 71st most populous in the United States.
Montgomery County is located adjacent to and northwest of Philadelphia and southwest of Bucks County. Montgomery County is geographically diverse, ranging from farms and open land in the extreme north of the county to densely populated suburban neighborhoods in the southern and central portions of the county. Many residents work in the city; however, Montgomery County is also a major employment center with large business parks in Blue Bell, Lansdale, Fort Washington, Horsham, and King of Prussia which attract thousands of workers from all over the region. Boroughs and townships include Ambler, Conshohocken, Cheltenham, Abington, Jenkintown, Ardmore and Narberth.