Five Fairfax County residents this week announced their candidacies for the Virginia House of Delegates.

In the 49th District, covering northeastern Fairfax and the City of Falls Church, Democrat Nora A. Squyres is seeking her first elected office.

In the 52nd District, covering southeastern Fairfax, three candidates -- Democratic incumbent Gladys B. Keating, Democrat David Temple and Republican Ben Partin -- joined the growing list of candidates.

And in the 51st District, covering southwestern Fairfax, incumbent Republican Robert E. Harris announced plans to seek a fifth term in the House.

All three districts include three seats each.

All five announcements come in the wake of a ruling by the U.S. Justice Department that parts of the new redistricting plan, approved by the General Assembly last spring, do not meet federal guidelines for fair treatment of minorities. In rejecting the state House plan, the Justice Department held that it discriminated against black voters in the City of Petersburg and five nearby predominantly black counties.

In addition to the Justice Department ruling, several court suits have been filed contesting the plan. Those cases are pending and party primaries are still scheduled for Sept. 8, with the general election set for Nov. 3. 49th District

Squyres, a former financial analyst and program manager with the Federal Deposit Insurance Company, said her financial background would assist her in fighting to get Northern Virginians a "fair share" of the dwindling supply of state and federal funds.

A proponent of the Equal Rights Amendment, Squyres said she also supports completion of the entire Metro subway system, reform of the state sales tax on food and nonprescription drugs, and adequate funding for quality education, including special education programs.

Squyres, who is a Realtor and stockbroker, said she is concerned about the effects reduced federal and state funding will have no education and about the impact the failing economy has on working women. 51st District

Harris said one of his major goals, if he's reelected, will be to reduce state taxes. In attempting to do this, he said, he will reintroduce legislation next year to index state income taxes, similar to a federal plan just approved by Congress in which tax brackets would be adjusted for inflation. Similar legislation introduced last year by Harris failed to win General Assembly approval.

Harris, a member of the Northern Virgina Transportation Commission since 1974, said he also would continue to fight to alleviate Northern Virginia's traffic congestion through increased funds for road construction and maintenance. 52nd District

On the Democratic side, incumbent Keating said consumer issues continue to be one of her major interests. Well-known in consumer circles before here election to the House in 1977, Keating said she will reintroduce legislation that would require all state regulatory bodies to appoint a citizen representative. A similar measure failed in the past legislative session.

Keating, who was the first woman to serve on the House Committee on Corporations, Insurance and Banking, said she believes state family laws also need reform. In particular, Keating said, divorce laws and wills are two areas where major revisons are needed. "It's too easy in Virginia for soeone to slipo out on their responsibility," she said. Keating said she also would push for ratification of the Equal Rights Amendment.

Ratification of the ERA also is a prime concern of Democrat Temple, who lost a previous House bid in 1979. Temple stressed that the upcoming election is the last chance Virginians will have to elect officials who support the ERA before the Congressional deadline for approving the amendment.

On the other issues, Temple, an education and former member of the Fairfax County Human Rights Commission, said the General Assembly should replace education funds lost through cutbacks in impact aid. He also added that it would be up to the Assembly to protect those people who fall through President Reagan's so-called "safety net" of social programs: "public school children and their parents, the college-bound, the middle-income wage earners, the elderly and the hancapped."

The third candidate, Republican Partin, said he supports revisions in state marital and divorce laws that would offer greater protection to women, but does not endorse ratification of the ERA. The amendment, Partin contends, "offers unlimited potential for judicial mischief." Partin also said he opposes federal and state funding of abortions.

Partin, a consulting engineer making his first bid for elective office, said that education is at the top of the list of his interests. In that area, he said, a primary factor in choosing textbooks should be books that inculacate a strong work ethic and the "cherished values of society." He does not, however, support censorship of student library books.