Barbara Wilson Parker, 57, a founder and president of the Montgomery County Animal Rescue League, died of Legionnaire's disease Tuesday at the National Institutes of Health in Bethesda.

Mrs. Parker, who was born in Concord, N.H., was a 1948 graduate of Edgewood Park Junior College in Briarcliff, N.Y. From 1948 until 1952, she worked as a secretary at the Massachusetts Institute of Technology in Cambridge, Mass.

In 1952, she moved to Washington and worked for two years as an administrative aide to Sen. Stiles Bridges (R-N.H.).

In 1954, she married Evan James Parker Jr. and they spent the next six years living in Saipan and later in Hawaii.The Parkers returned to the Washington area in 1960 and settled in Potomac.

Through her work with the Montgomery County Animal Rescue League, Mrs. Parker promoted public education and legislation against animal abuse and theft. In 1978, she was presented with the Humanitarian Award by the Montgomery County Humane Society.

She was a member of the Maryland Federation of Humane Organizations and the Montgomery County Society for the prevention of Cruelty to Animals and a volunteer with the Montgomery County Animal Shelter.

In addition to her husband, survivors include a son, Evan James III, and a daughter, Deborah Ann, all of Potomac, and a brother, Frank P. Wilson of Concord, N.H.

The family suggests that expressions of sympathy be in the form of contributions to the Montgomery County Animal Rescue League, 9520 Accord Drive, Potomac, Md.