POTTSTOWN, a borough of Montgomery county, Pennsylvania, United States, is picturesquely situated on the Schuylkill river, in a plain surrounded by hills. It is 18 miles east-south-east of Reading and 40 miles westnorth-west of Philadelphia, at the junction of the Philadelphia and Reading (main line) and the Colebrookdale Railroads, and has communication also by the Schuylkill Valley branch of the Pennsylvania Railroad. There are in and near Pottstown six rolling-mills, two blast-furnaces, three iron and brass foundries, two nail-factories, and large bridge works, besides minor industries. The population of Pottstown was 4125 in 1870, and 5305 in 1880.