 allenport is a borough on the monongahela river in washington county, pennsylvania and part of the pittsburgh metropolitan area since 1950. the population was 549 at the 2000 census. ==geography== allenport is located on state route 88 about  northeast of california, pennsylvania, on the west bank of the monongahela river. according to the united states census bureau, the borough has a total area of , of which  is land and  (7.51%) is water. ==government== the townspeople are represented by an elected mayor and borough council. ==demographics== {{uscensuspop |1940=1078 |1950=923 |1960=981 |1970=762 |1980=735 |1990=595 |2000=549 |2010=537 |estimate=535 |estyear=2012 |footnote=sources:{{cite web|url=http://www.census.gov/prod/www/abs/decennial/|pub
Boroughs_in_Pennsylvania Boroughs_in_Washington_County,_Pennsylvania Pittsburgh_metropolitan_area Populated_places_established_in_1816 Populated_places_on_the_Monongahela_River