Dr. Lee H. Carter, 50, a Rockville chiropractor since 1953 who was active in civic and professional groups, died Saturday at Surburban Hospital in Bethesda after a heart attack.

At the time of his death, he was president of the Southern Maryland Chiropractic Association and a fellow of the International College of Chiropractors.

Dr. Carter was a member of the Governor's Council on Physical Fitness and had been vice president of the Montgomery Health and Welfare Council. He had been both a county and metropolitan area chairman of "Toys For Tots" and during the mid-1960s had been president of the Rockville Rotary Club.

A native of Brooklyn, N.Y., Dr. Carter moved to Chevy Chase in 1934. He attended Western Maryland College and was a graduate of the National College of Chiropracitc in Lombard, Ill. He had practiced in Chevy Chase and Bethesda before moving to Rockville.

He served with the 1st. Marine Division in Korea during the conflict there. After that, he remained in the reserves and retired with the rank of lieutenant colonel in 1977.

Survivors include his wife, Barbara Ann, of Rockville, and his mother, Ruth C. Henderson of New York City.

The family suggests that expressions of sympathy be in the form of contributions to the Assumption Roman Catholic Church in Washington.