The city of Northampton is the county seat of Hampshire County, Massachusetts, United States. As of the 2010 census, the population of Northampton's central neighborhoods, (excluding its outer, incorporated villages, Florence, Massachusetts and Leeds, Massachusetts,) was 28,549. Northampton is part of the Pioneer Valley, and also one of the northernmost cities in the Knowledge Corridor - a cross-state cultural and economic partnership with other Connecticut River Valley cities and towns. Northampton is home to Smith College and the Clarke School for the Deaf. Smith students (along with those of the associated Five Colleges) contribute to Northampton's "college town" atmosphere.