Getting an early start on campaign contests to be decided in June, the six legislators who represent Arlington in the Virginia General Assembly announced yesterday that they all will run for reelection to the Senate or House of Delegates seats they currently hold.

The incumbents -- Sens. Clive L. DuVal II and Edward M. Holland and Dels. James F. Almand, Elise B. Heinz, Mary A. Marshall and Warren G. Stambaugh -- all are Democrats.

Although the Arlington assembly delegation members are the first to formally announce their candidacies for the June 12 primary and Nov. 6 gereral election, other Northern Virginia legislators are beginning to make known their political intentions.

Del. Vancent F. Callahan Jr. (R-Fairfax), who is considering retiring, the full 27-member delegation is expected to campaign to return to Richmond.

Included in that group is Del. Richard L. Saslaw (D-Fairfax), who plans to run for the Senate seat being vacated by retiring Sen. Omer L. Hirst (D-Fairfax), and Del. Raymond E. Vickery Jr. (D-Fairfax), who plans to challenge incumbent Sen. Charles L. Waddell (D-Loudoun).

In announcing for reelection yesterday, the Arlington legislators also took time to discuss and assess the just-concluded assembly's performance.

The defeat of the Metro sales tax measure to help defray the subway's operating defickit put a damper on the session, they agreed. But they said Northern Virginia residents made gains in several statewide bills that reformed bingo regulations, set up teacher grievance procedures and solved longstanding disputes over annexation procedures.

Stambaugh said he hoped to take a new look at the Metro funding issue next year and "search out some alternative that doesn't scare people as much as the sales tax."

Holland, noting that only two members of the delegation opposed the sales tax measure, said he doubted that area legislators could find a Metro financing method that would have such broad based support.

Heinz detailed a list of measures affecting women, most of which died in assembly committees. She said she had been told that a measure establishing the concept of marital property in divorce settlements was opposed by men because its backing by all nine women in the assembly "created a male-female conflict that made men defensive."

Yet at the same time, Heinz said, she was told a bill to revamp the state's sexual assault laws met defeat because "all the people out front on it were men." She said such comments posed a dilemma the women "will have to deal with next year."