Virginia Democrats will indicate which of the party's presidential candidates they favor today when the party holds a series of mass meetings across the state.

Seventeen meetings are scheduled in Northern Virginia's 8th and 10th congressional districts to begin the process of selecting delegates to the Democratic National Convention to be held in New York this summer.

Registered voters wishing to participate in the meetings must be in line to register for the gatherings by noon, party officials said yesterday.

Supporters of President Carter, Sen. Edward M. Kennedy and Gov. Edmund G. (Jerry) Brown Jr. are expected to attend many of the meetings and to vote for delegates pledged to their presidential candidate. Others are running as uncommitted delegates.

All those selected at Saturday's meetings will be eligible to attend their party's congressional district conventions in April and the party's state convention in Richmond on May 16-17. A total of 64 Virginia delegates will be picked at these meetings to attend the national convention on Aug. 11-14.

The Northern Virginia meetings, locations and the time registration will open at each location are: ARLINGTON

Registration 10:30 a.m.; Kenmore Intermediate School, 200 S. Carlin Springs Rd. ALEXANDRIA

Registration 10:30 a.m.; Francis Hammond High School auditorium; 4646 Seminary Rd. LOUDOUN

Registration 11 a.m.; J. Lupton Simpson Middle School, Rte. 621 Leesburg. PRINCE WILLIAM

Registration 11:30 a.m.; Prince William County Armory, Dumphries Road, Manassas. FAIRFAX

Registration begins at 11 a.m.

Annandale: Annandale High School 4700 Dr., Annandale.

Centreville: James Madison High School, 2500 James Madison Dr., Vienna.

Dranesville: Cooper Intermediate School, 977 Balls Hill Rd.; McLean.

Lee: Mark Twain Intermediate School, 4700 Franconia Rd., Alexandria.

Mason: J. E. B. Stuart High School, 3301 Peace Valley La., Falls Church.

Mount Vernon: Groveton High School, 6500 Quander Rd.; Alexandria.

Providence: Whittier Intermediate School, Hillwood Avenue and Cherry Street, Falls Church.

Springfield: Irving Intermediate School, 8100 Old Keene Mill Rd., Springfield. FAIRFAX CITY

Registration 11 a.m.; Fairfax High School, choral arts department, 3500 Old Lee Highway, Fairfax City. FALLS CHURCH

Registration 11 a.m.; George Mason High School, 7124 Leesburg Pike, Falls Church. MANASSAS

Registration 11 a.m.; Manassas City Hall, 9025 Center St., Manassas. MANASSAS PARK

Registration 11:30 a.m.; Manassas Park Elementary School, 101 Tremont St., Manassas Park. STAFFORD COUNTY

Registration 11 a.m.; Stafford County Court House, main court room, Stafford.