Effective July 1, 1997, Rockingham County was ceded to District 66 as a result of resolutions passed by the District 27 Council and approved by the Toastmasters International Board of Directors.

On July 1, 2011, a new District will be re-formed from District 27.  Having grown from 111 clubs to more than 235 clubs in 21 years, the District 27 Council passed a resolution in May 2010, approved by the Toastmasters International Executive Committee to re-form into two districts.  The boundary between the two newly formed districts are (from the Chesapeake Bay) using the Potomac River north to the Wilson Bridge, then west/northwest along the I-495 beltway, the east on I-66, then northeast along the Arlington County Line, and back to the Potomac River).

With the exception of Clarke and Frederick counties being a part of District 18, northern Virginia will remain a part of both newly re-formed districts.  District 27 will include Arlington County and parts of Fairfax county inside the I-495 beltway.  The new District west of the boundary split will encompass northern Virginia outside of the I-495 beltway. It includes the counties of Westmoreland, King George, Stafford, Spotsylvania, Orange, Madison, Greene, Shenandoah, Page, Culpeper, Fauquier, Prince William, Rappahannock, Warren, Loudoun, Northumberland and parts of Fairfax outside of the I-495 beltway and west of Arlington county (north of I-66 inside the beltway).