The District of Columbia's Department of Human Services, under court order since July to make major improvements in the care and education of delinquent youths, announced yesterday that it plans to hire 269 employes for its troubled Youth Services Administration.

Agency officials said the staff increase is part of an organizational "realignment" to improve the overall management and control of youth services programs, reduce overtime costs and more clearly define staff responsibilities in tending to the 6,000 delinquents whom the city incarcerates or detains each year.

The new employes include social workers and psychologists to better diagnose the problems of youths entering the agency's care, counselors and others who manage programs for the youths, and additional administrative personnel.

The agency operates the city's detention facilities for youths in suburban Laurel, as well as Oak Hill, the Oak Hill Annex (formerly Cedar Knoll) and the Receiving Home in Northeast Washington.

"The agency has suffered a great deal of trauma," said Jesse E. Williams Jr., the director of youth services since February. "We hope to move forward with these changes . . . {but} solutions will not happen in a day."

The District's agency for youths entered into a consent decree a year ago as part of an out-of-court settlement of a class-action lawsuit. The suit, brought by the Public Defender Service and the American Civil Liberties Union's Prison Project, charged that the city's three juvenile institutions were unsafe and that youths are beaten and given inadequate schooling.

Williams and Byron C. Marshall, the acting human services director, said yesterday the new hiring plan and reorganization addressed specific issues raised by the consent decree and reflected the agency's own internal "assessment of the situation in youth services."

Williams said the agency is in "substantial compliance but not full compliance" with the court decree.

However, a court-appointed monitor has reported that the city has made disappointing progress on its promises so far, particularly in hiring the personnel needed to staff the youth services programs properly.

"It's fair to say and not a secret that the city has done some things well and not others," said Michael Lewis, the court-appointed monitor for the District's facilities for juveniles. "And one of the things they have not done well is recruit and hire staff required by the decree."

Lewis, while expressing approval that the agency had announced a plan to hire additional staff, said the city's record in the last 10 months on making agreed-upon changes "is pretty dismal."

He said one reason compliance "has gone as slowly as it has" is because youth services didn't get a full-time administrator until February.

Another principal in the case, who asked not to be identified, said the city to date has "a terrible record" of compliance and faces "being dragged into court again" if improvements aren't forthcoming.

The youth agency has 425 authorized positions and a budget of $22 million. For fiscal 1988, officials said they would seek to increase the budget to about $31 million.

Williams said 96 of the new employes, primarily psychologists, psychiatrists and social workers, will be assigned to diagnostic units at Oak Hill and the Receiving Home. An additional 82 positions have been earmarked for youth group leaders and security staff to cut overtime costs. Finally, the agency is hiring 91 employes to provide management and administrative support, improve community-based facilities and provide more focused treatment and rehabilitation.

The new hiring has already started, Williams said, and should make a significant impact on services by the end of this fiscal year. He said the agency was proceeding with plans to close the Oak Hill annex by December, as indicated in the consent decree.