Dr. Katharine A. Chapman, 87, a practicing physician in the Washington area for 60 years until two months ago when she entered the Bethesda Retirement and Nursing home, died there July 11 of a heart ailment. She had resided and practiced family medicine in Kensington.

Over the years, Dr. Chapman delivered more than 3,000 babies. She was a past president of both the Montgomery County Medical Society and the Women's Medical Society of Maryland. She was a member of the American Academy of General Practice and the D.C. Medical Society. She was named 1963 "Maryland Family Doctor of the Year" by the Maryland Academy of General Practice.

In addition to her private practice, she was an examining physician with the Washington YWCA from 1928 to 1930. From the mid-1930s to the mid-1960s, she was the examining physician for freshman women at the University of Maryland.

Dr. Chapman had been affiliated with the George Washington University, Suburban and Montgomery General hospitals as well as the Washington Sanitarium. She also had served as health officer for the town of Kensington.

Dr. Chapman was a native of Washington and graduate of Sidwell Friends School. She was a 1922 graduate of George Washington University and earned her medical degree there in 1925. She served her internship and residency at George Washington University Hospital before beginning her private practice in 1926. She was a typist with the War Department while attending school.

She was a life member of Calvary Baptist Church in Washington. At the time of her death, she attended the First Baptist Church of Wheaton in Silver Spring.

Survivors include one sister, Margaret Tremearne of Kensington.