Abington Township is a township in Montgomery County, Pennsylvania, United States, adjacent to Philadelphia's northern fringe. The population was 55,310 as of the 2010 census, making it the sec…Abington Township is a township in Montgomery County, Pennsylvania, United States, adjacent to Philadelphia's northern fringe. The population was 55,310 as of the 2010 census, making it the second most populous township in Montgomery County. The population density is 3603.3 per square mile, making it the second most densely populated township in Montgomery County.