The first white settlers arrived in 1773-1774, having purchased the land from the descendants of William Penn; other pioneers soon bought land from the state government. In 1912, 'Mount Lebanon Township' was incorporated as a "First Class Township" under Pennsylvania state law. It had formerly been a part of Scott Township, Allegheny County, PennsylvaniaScott Township, which in turn traces its origins to the long-defunct St. Clair township. Mount Lebanon was named for two Cedars of Lebanon trees from Palestine that were planted in 1850 on land that is now part of the Mt. Lebanon Country Club. In 1928, Mount Lebanon became the first "First Class Township" in Pennsylvania to adopt the Council-manager governmentcouncil-manager form of government and has had an appointed manager serving as the chief administrative officer since that time. Mount Lebanon became a streetcar suburb almost immediately: the first line through the area opened in 1902, the second in 1924. Between the 1920 and 1930 censuses, the township's population skyrocketed from 2,258 to 13,403. Today, Pittsburgh's mass transit agency, the Port Authority Transit of Allegheny County, or "PATransit," operates a Rapid transitsubway system whose 42-S line runs underneath Uptown Mt. Lebanon, merges with the 47-L line in Pittsburgh's Mt. Washington section, and connects to the WBA and EBA busway lines at Downtown Pittsburgh's intercity rail station, Penn Station. Mt. Lebanon's only platform station, Mt. Lebanon Station, is in Uptown Mt. Lebanon; the adjacent Dormont Junction and Castle Shannon stations are in neighboring municipalities. And as of the census of 2000, there were 33,017 people living in Mt. Lebanon. On May 21, 1974, the electorate approved a Home Rule Charter, which took effect on January 1, 1975 making Mount Lebanon one of the first municipalities in Pennsylvania to adopt a home rule charter. In the charter, the official name of the municipality became 'Mt. Lebanon, Pennsylvania'; the word "Mount" is abbreviated in all government documents, although the U.S. Postal Service continues to use "Mount." Source: http://en.wikipedia.org/wiki/Mt._Lebanon%2C_Pennsylvania