Frank William Frederick Johnson (June 1866 - September 1943) was a British Army officer and Member of the Legislative Assembly for Salisbury South constituency.
Frank William Frederick Johnson was born in June 1866 in Watlington, Norfolk. He completed his early education at King Edward VII, but decided not to study medicine and follow his father's vocation.
Johnson reached Cape Town in August 1882. Later, he served the Bechuanaland Border Police.