Christianity, at 2.1 billion people, has the most followers of any religion.
Rappahannock County, Virginia. For the Rappahannock County that existed from 1656-1692, see Rappahannock County (1656), Virginia. Rappahannock County is a county located in the Commonwealth of Virginia, US. As of the 2010 census, the population was 7,373. Its county seat is Washington.
The county is situated in Northern Virginia on the south bank of the Potomac River directly across from Washington, D.C. Arlington is also bordered by Fairfax County and City of Falls Church to the northwest, west and southwest, and the City of Alexandria to the southeast.