Harold Lester Johnson (April 17, 1921 – April 2, 1980) was an American astronomer.
Johnson was awarded the Helen B. Warner Prize by the American Astronomical Society in 1956. He is mostly remembered for introducing the UBV photometric system (also called the Johnson or Johnson-Morgan system), along with William Wilson Morgan in 1953.
He died of a heart attack in Mexico City in 1980.