Robert Maphis Wick, 73, an artist whose works were exhibited in Washington, New York, Boston and Richmond, died Thursday at Shenandoah County Memorial Hospital in Woodstock, Va., after a long illness.

A native of Washington, he had lived here before moving to Woodstock about 30 years ago.

A graduate of the University of Maryland, Mr. Wick held a master's degree from George Washington University.

He painted mostly landscapes and seascapes, working in oils, watercolors and other medium, and had held a number of individual shows here and elsewhere.

Mr. Wick was the founder and first president of the Shenandoah Valley Artists Association. He had been director of the Orkney Springs Art Festival. At one time, he operated the Wayside Gallery in Middletown, Va.

He was a member of the Arts Club of Washington, the American Art League and Artists Equity. He was a former vestryman of Emmanuel Episcopal Church in Woodstock.

He is survived by his wife, Suzanne, of the home; a sister, Mrs. Frank Summers, of Tigard, Ore.; three step-daughters, Mrs. David C. Holland, of Alexandria, Mrs. Judson S. Smith, of Lebanon, N.J., and Mrs. Davids Z. Webster, of Needham Heights, Mass., and five stepgrandchildren.

The family suggests that expressions of sympathy may be in the form of contributions to Emmanuel Episcopal Church.