JOHNSTOWN, a burgh of Cambria county, Pennsylvania, U.S., is situated on the Stony Creek and the Conemaugh river, 78 miles east of Pittsburg and 277 miles west of Philadelphia. It is the centre of nine contiguous boroughs constituting one town of 22,000 inhabitants, who are mainly employed by the Cambria Iron Company in the manufacture of iron, steel, railway bars, wire, &c. There are large woollen and flouring mills, numerous churches, and a public library. The library building was presented to the Library Association by the Cambria Iron Company. The population in 1870 was 6028, and in 1880 8380.