George Alonzo Ferguson, 84, a retired Washington high school teacher, died Tuesday at Howard University Hospital. He suffered from a heart ailment.

An architect and a veteran of both World Wars, he taught mechanical drawing at Armstrong and then Roosevelt high schools from 1921 until retiring in 1965.

Mr. Ferguson also had his own office as an architect here and designed churches, schools and houses.

He was born in Washington and received a degree in architecture from the University of Illinois at Urbana. He served in France as an Army officer in World War I.

Mr. Ferguson returned to active duty in World War II and attained the rank of lieutenant colonel. He was one of the commanders of the 366th Infantry Regiment at Fort Devens, Mass., and later saw combat in Italy.

The 366th Infantry Veterans honored him last year at the Officers' Club at the Washington Navy Yard.

Mr. Ferguson was an active member of Mount Zion United Methodist Church in Washington. He had been president of the Rifle Association at Columbia Beach, Md., where he maintained a summer home. He lived in Washington.

He is survived by two sons, Roger W. and George A. Jr., both of Washington; four daughters, Thelma F. Jordan and Mary F. Smith, both of Battle Creek, Mich., Dr. Angella F. Altemus, of Chevy Chase, and Carole F. Howard, of Cheverly; 14 grandchildren and three great-grandchildren.