Two daughters of Virginia Gov. Charles S. Robb will enroll in Fairfax County public schools when Robb returns with his family to their home in McLean at the end of his term in mid-January, George Stoddart, Robb's press secretary, said yesterday.

Robb's daughter Catherine, 15, will become a 10th grader at Langley High School in McLean after finishing first semester final exams at her public school in Richmond, Stoddart said, even though the Robbs' house is now in the McLean High School district.

The Robb house on Chain Bridge Road was in the Langley attendance zone until boundaries were changed last year. Catherine is allowed to attend Langley because all students whose houses were in the Langley area before the boundary change are allowed to pick which school they want to attend, Superintendent Robert R. Spillane said yesterday. Both schools are known for having very high scholastic test scores.

"We treated them exactly like . . . any other kid who lived in that neighborhood," Spillane said. "The Robbs weren't asking for any special treatment."

The Robbs' request to send Catherine to Langley received high-level handling. It was assigned to John F. Schreck, formerly special assistant to the superintendent and now assistant superintendent for career and resource development.

Spillane said he asked Schreck to answer the Robbs' request because "he's in Richmond all the time" as the county school liaison official to the General Assembly.

"I said, 'John's down there; he knows what our policies are,' " Spillane recalled telling his aides.

Jennifer Robb, 7, will begin second grade classes at Franklin Sherman Elementary School Jan. 13, Stoddart said.

The Robbs' eldest daughter, Lucinda, graduated from high school last year and is taking postgraduate courses at the private Phillips Exeter Academy in New Hampshire.

Spillane said the county plans no special treatment for the two new students, and he is hopeful they will be allowed to fit in quietly.

"There's enough of a burden on children, even those of someone lowly like the superintendent, because of their fathers," Spillane said. "I think in Fairfax County there are so many celebrity types -- congressmen and senators -- that it's not such a big deal."

The two older Robb daughters attended private schools before the governor's election when the family formerly lived in McLean. When they enrolled in Richmond's predominantly black public schools in 1982, they became the first children of a Virginia governor to do so since Linwood Holton personally escorted his daughter to an integrated city school in 1970.