Newington is a census-designated place (CDP) in Fairfax County, Virginia, United States.

[4] The 2010 census showed a significant decrease after half the population was split off to the newly created Newington Forest CDP.

Interstate 95 passes through the middle of the CDP, with access from Exit 166 (Virginia Route 286, the Fairfax County Parkway).

The house itself was purchased by the family of William Nevitt, in 1828, along with 1000 acres of land; they occupied the building until it burned in 1875.

Originally known as the Long Branch Station and later renamed Accotink and then Newington, it was closed in 1971; it is remembered by a historic marker erected by the Fairfax County History Commission in 2005.

[6] Also in the Newington area are the remains of the Mount Air plantation, originally granted to Dennis McCarty in 1727.

The house was destroyed by fire in 1992, but ruins remain; they, too, are denoted by a historic marker, erected in 2006,[7] and are owned by the Fairfax County Park Authority, which interprets the site.

[8] As of the 2020 census (some information from the 2022 American Community Survey) there were 13,223 people, 4,469 housing units and 4,611 households residing in the CDP.

Of the residents, 4.9% had Italian ancestry, 36.3% spoke a language other than English at home, and 26.6% were born outside the United States, 75.9% of whom were naturalized citizens.

[9][10] The climate in this area is characterized by hot, humid summers and generally cool to cold winters with moderate snowfall.