EAST PITTSBURGH, a borough of Allegheny county, Pa., U.S.A., on the Monongahela river, 12m. S.E. of Pittsburgh. It is served by the Bessemer and Lake Erie, the Pennsylvania, the Pittsburgh and Lake Erie, and the Union railways. The popula tion was 6,527 in 1920 (3o% foreign-born white), and was 6,214 in 1930 by the Federal census. The principal manufactures are electrical apparatus and dairy products. The borough was settled about 1871 and incorporated in