L. Jackson Embrey, 68, a retired judge of the Arlington County Court, died Friday at a hospital in Brandon, Fla., after a heart attack. He had lived in Jekyll Island, Ga., since 1976 and was visiting relatives in Florida when he was stricken.

Judge Embrey, who was born in Washington, graduated from the old Central High School and earned his law degree at George Washington University. After Army service in Europe in World War II, he established a private law practice in Arlington, becoming a partner of the firm of Ball, McCarthy, Embrey & Ball.

In 1964, he was appointed a judge of the Arlington County Court, which tries misdemeanors and civil actions involving $3,000 or less. He remained on the court until his retirement in 1975.

Judge Embrey was a member of the Thad Dulin Post of the American Legion. He also was a past president of the General Alumni Association of George Washington University and a past president of the Colonials athletic organization at George Washington.

Survivors include his wife, the former Dorothy McGonigle, and a sister, Dulcie E. Jones, both of Jekyll Island.

The family suggests that expressions of sympathy be in the form of contributions to the Heart Fund of the American Heart Association.