Rossiter is a Census-designated place (CDP) in Indiana County, Pennsylvania, United States. The population was 646 at the 2010 census.
Rossiter is located at 40°53′47″N 78°56′3″W (40.896440, -78.934208).
According to the United States Census Bureau, the CDP has a total area of 1.9 square miles (4.9 km2), all of it land.
Rossiter was formed in 1901 as a coal mining town, and was originally named after William Rossiter, the chief stockholder of the Clearfield Bituminous Coal Corporation. Many of the residents went through the infamous 1927 Indiana bituminous strike. Coal mining stopped in the late 1940s when the mines shut down.
As of the census of 2000, there were 790 people, 249 households, and 169 families residing in the CDP. The population density was 424.3 people per square mile (164.0/km2). There were 282 housing units at an average density of 151.4/sq mi (58.5/km2). The racial makeup of the CDP was 100.00% White. Hispanic or Latino of any race were 0.25% of the population.