Allegheny County, Pennsylvania
…1.31% 2012 262,039 42.01% 352,687 56.54% 9,101 1.46% 2016 259,480 39.48% 367,617 55.94% 30,092 4.58% 2020 282,913 39.03% 430,759 59.43% 11,128 1.54% 2024 283,595 39.18% 429,916 59.40% 10,288 1.42% As of 19 May 2025, there were 908,024 registered voters in the county; a majority were Democrats. There were…