WordNet (r) 3.0 (2006):

Monongahela
    n 1: a river that rises in northern West Virginia and flows
         north into Pennsylvania where it joins the Allegheny River
         at Pittsburgh to form the Ohio River [syn: Monongahela,
         Monongahela River]

U.S. Gazetteer Places (2000):

Monongahela, PA -- U.S. city in Pennsylvania
   Population (2000):    4761
   Housing Units (2000): 2382
   Land area (2000):     1.925692 sq. miles (4.987519 sq. km)
   Water area (2000):    0.206757 sq. miles (0.535499 sq. km)
   Total area (2000):    2.132449 sq. miles (5.523018 sq. km)
   FIPS code:            50408
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             40.200462 N, 79.928394 W
   ZIP Codes (1990):     15063
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Monongahela, PA
    Monongahela