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 Phil-adelphia a.nd 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 brms foundries, two nail-factories, and large bridge works, besides minor industries. The population of Pottstown was 4125 in 1870, and 5305 in 1880.