2 entries match your criteria. Related Historical MarkersAccording to the Key to Inscriptions on Virginia Highway Historical Markers booklets, these were the only two county line markers erected on the Arlington County-Fairfax County line and both are no longer there. Arlington County / Fairfax County Marker SHOWN IN SOURCE-SPECIFIED ORDER 1 ► Virginia, Arlington County, Arlington, East Falls Church — Z-127 — Arlington County / Fairfax County — Area 31 Square Miles / Area 417 Square MilesOn Langston Boulevard (U.S. 29) near North Westmoreland Street. Reported permanently removed. 2 ► Virginia, Fairfax County, McLean — Z-128 — Arlington County / Fairfax County — Area 31 Square Miles / Area 417 Square MilesOn Chain Bridge Road (Virginia Route 123) 0.4 miles west of North Glebe Road ( Route 120). Reported missing. ︽