Most of the National District schools have stayed intact since its founding. In 1996, West Potomac moved from the National to the Patriot and Falls Church was added from the Liberty District. From 2003 to 2005,
Jefferson moved from the Concorde to the National only for football, where the Colonials clinched a Division 5 playoff berth in 2004.
Loudoun Valley of
Purcellville was added in 2005 as a full member for football, but as a part-time member in other sports by participating only in post season district tournaments, because it was located about 50 miles or more west of the National District schools. In sports other than football, Valley played an independent schedule, usually against schools in the AA Dulles District. In 2007, Loudoun Valley was moved to the Northwest Region which was regarded as a welcomed move to the National District's members. Hayfield joined the National in 2009, as its population was cut nearly in half by the opening of South County in 2005 making it a struggle for the Hawks to compete with schools in the Patriot District whose student bodies were nearly double. Starting with the 2015–16 school year, the National District will have the same membership as Capitol Conference 13.(2) The number of schools in the National District will reduce from eight to seven. Mt. Vernon, which has been reclassified as a 6A size school starting with the 2015–16 season, and Hayfield, already a 6A, moves to the Patriot District/Conference 7. Arlington County high schools Washington-Liberty and Yorktown, who were already 6A in size since the 2013–14 school year, will shift from the National to the Liberty District/Conference 6 to join those 6A size schools. Moving from the Liberty to the National will be George C. Marshall and Thomas Jefferson. John R. Lewis comes to the National/Capitol from the Patriot. All those schools are 5A in size. The new district changes means all the schools in the former Northern Region under the three classification setup will now have all 6A and 5A schools grouped in the same districts as their conference assignments with the new six classification arrangement. As of July 1, 2021, the National District would consolidate with the remaining Gunston District members, and continue to bear the National District name moving forward, thus ending the 2nd incarnation of the Gunston District. ==Membership History==