Waldo, Arkansas. Waldo is a town in Columbia County, Arkansas, United States. The population was 1,372 at the 2010 census.
Reston is a census-designated place (CDP) in Fairfax County, Virginia, United States, within the Washington, D.C. metropolitan area. The population was 58,404, at the 2010 Census and 56,407 at the 2000 census.
Fairfax County, officially the County of Fairfax, is a county in the Commonwealth of Virginia. As of the 2010 census, the population was 1,081,726, in 2014, the population was estimated to be 1,118,883, making it the most populous jurisdiction in the Commonwealth of Virginia, with 13.6% of Virginia's population.orthern Virginia, including Fairfax County, is the third worst congested traffic area in the nation, in terms of percentage of congested roadways and time spent in traffic. Of the lane miles in the region, 44 percent are rated F or worst for congestion.