Westmoreland County was the first colony in Pennsylvania erected west of the Allegheny Mountains. Originally, the county seat was in Hanna's Town until it was moved in the 1780's to its present location in Greensburg. The county hosts many relics of several wars including Fort Ligonier, Bushy Run Battlefield and Historic Hanna's Town.

On the Lincoln Highway, Westmoreland County stretches from North Huntingdon in the west to Laughlintown. Tourists can visit Idlewild Park for a look at the Lincoln Highway Kiddie Ride or for some old-fashioned amusement. Visitors will find that many of the communities host festivals and parades throughout the year.