Henry Coe Lanpher, 84, a retired criminologist for the Justice Department's Federal Bureau of Prisons who had served on college social work and public welfare faculties, died of pneumonia Friday at George Washington University Hospital.

Dr. Lanpher was a criminologist for the Federal Bureau of Prisons from 1943 until his retirement in 1958. Before that, he served as director of the School of Social Work of the College of William & Mary in Richmond and was a member of the faculty of Louisiana State University's Graduate School of Public Welfare Administration.

He was born in Brooklyn, N.Y., attended Brown University and graduated from the University of California at Los Angeles. In 1941, he earned a doctorate in social service administration from the University of Chicago.

Dr. Lanpher had served as a volunteer with the American Field Service in France during World War I and later served in the war as a naval aviator.

He and his wife, the former Anne Gibson, lived in Alexandria for 28 years before moving to Washington in 1974. They also maintained a residence in June Lake, Calif.

Besides his wife, survivors include a daughter, Mrs. Peter D. Ellis of Los Angeles; two sons, E. Gibson, of London, England, and Lawrence C., of Bethesda, eight grandchildren and two great-grandchildren.