George Otis Johnson, 72, a retired federal employe and former police chief of both Seat Pleasant and Capitol Heights, died Saturday at his home in Seat Pleasant. He had a heart ailment.

Mr. Johnson was a photogrammetric engineer with the Agriculture Department for 22 years before retiring in 1962.

He then served as police chief of Seat Pleasant until becoming chief of the Capitol Heights force in 1968. He retired from law enforcement in the early 1970s.

He also had been a member of the Town Council of Seat Pleasant in the mid to late 1960s.

He was a free-lance photographer and owned and operated the Prince George's Sign Shop in Capitol Heights for the last five years.

Mr. Johnson was a native of Jackson, Ga., and came to Washington in the early 1930s. He worked as a manager with the old Sidney Lust theater chain in Washington before joining the Argriculture Department.

He was a member of the Fraternal Order of Police and the Municipal Police Association and was an honorary member of the Amerian Legion. He volunteered his time with the Boy Scouts.

Survivors include his wife, Evelyn Norris Johnson of Seat Pleasant; two sons, George D., of College Park, and Alfred C., of Lutherville, Md.; a daughter, Dale Johnson of Atlanta, Ga.; a brother, A. Wayne, of Burbank, Calif.; two sisters, Blanche E. Johnson of Washington, and Florence Scott of St. Petersburg, Fla., and five grandchildren.