Belle View is in Fairfax County's New Alexandria.
New Alexandria is located in Fairfax County just south of the City of Alexandria. Old Town Alexandria was nearly fully developed before 1850 so when the city grew in the early 20th Century, development spread across Hunting Creek to New Alexandria. New Alexandria is younger than Old Town, but much of New Alexandria was developed in the 1920’s and 1930’s. By 1965 New Alexandria was nearly fully developed.