Catlett is a census-designated place (CDP) in Fauquier County, Virginia, United States. The population as of the 2010 Census was 296. It is located west of the Prince William County line. Catlett was a former rail stop on the Orange and Alexandria Railroad. The area was the site of many raids on the rail road during the American Civil War. Today, it is a small community.
Catlett contains H. M. Pearson Elementary School.