Fairfax County Republicans will hold mass meetings in eight locations tonight as the first step in selecting delegates for the GOP's national convention later this year.

The results of the meetings -- and the actual strength of Republican presidential contender in the county -- probably will not be clear until the party holds its Fairfax convention April 19.

Northern Virginia results must also await the outcome of mass meetings to be held in Prince William County on Thursday, Loudoun County, April 12; Fairfax City, April 21, Falls Church, May 1, and Arlington, May 10. 1

Unlike Virginia's Democrats, who held all their mass meetings Saturday, Virginia Republicans will meet in a series of variously scheduled caucuses leading up to the Congressional District meetings in May and the state GOP convention in Richmond on June 6-7. Ultimately, 51 delegates will be chosen to attend the national convention in July.

The Fairfax County meetings, which begin tonight at 8 p.m., will take place at the following locations:

Annandale District -- Jefferson High School, 6560 Braddock Rd., Alexandria.

Centreville District -- South Lake High School, 11400 South Lake Dr., Reston.

Dranesville District -- Cooper Intermediate School, 977 Ball Hill Rd., McLean.

Lee District -- Mark Twain Intermediate School, 4700 Franconia Rd., Alexandria.

Mason District -- Stuart High School, 3301 Peace Valley La., Falls Church.

Mount Vernon District -- Ft. Hunt High School, 8426 Ft. Hunt Rd., Alexandria.

Providence District -- Falls Church High School, 7521 Jaguar Tr., Falls Church.

Springfield District -- Crestwood Elementary School, 6010 Hanover Ave., Springfield.