Lansdale is a borough in Montgomery County, Pennsylvania, 28 miles northwest of Philadelphia. Early in the 20th century, its industries included agricultural implement works, a canning factory, foundries, brickyards, a silk mill, and manufacturers of cigars, stoves, shirts, rope, iron drain pipe, and glue. In 1900, 2,754 people lived here; in 1910, 3,551; and in 1940, 9,316 people were inhabitants of Lansdale. The population was 16,269 at the time of the 2010 census.
Lansdale is located at 40°14′31″N 75°17′3″W / 40.24194°N 75.28417°W / 40.24194; -75.28417 (40.241956, -75.284083).
According to the United States Census Bureau, the borough has a total area of 3.1 square miles (7.9 km²), all of it land.