New Bloomfield is a borough in Perry County, Pennsylvania, and is the county seat. The population was 1,247 at the 2010 census. It is part of the Harrisburg–Carlisle metropolitan statistical area.
New Bloomfield was laid out in 1823, and named for the blooming clovers near the original town site. A post office called New Bloomfield has been in operation since 1825.
The Perry County Courthouse was added to the National Register of Historic Places in 1975.
The official name of the borough is Bloomfield. However the United States Postal Service, presumably to avoid confusion with the neighborhood of Pittsburgh which is also named Bloomfield, refers to the area as "New Bloomfield."
According to the United States Census Bureau, the borough has a total area of 0.5 square miles (1.3 km2), all of it land.
As of the census of 2000, there were 1,077 people, 396 households, and 255 families living in the borough. The population density was 1,983.1 people per square mile (770.1/km2). There were 425 housing units at an average density of 782.6 per square mile (303.9/km2). The racial makeup of the borough was 98.89% White, 0.56% African American, 0.28% Native American, and 0.28% from two or more races.