Douglas Archibald Hamilton Ritchie (14 February 1918 – 1999) was a Rhodesian dentist and politician. Born in the Colony of Jamaica to British parents, his family moved to the United Kingdom in his youth. After serving in the Royal Air Force during World War II, he moved to Southern Rhodesia and practised dentistry. He soon became one of the leading dentists in Rhodesia, and was elected to the Medical Council of Rhodesia in 1958. He entered politics in the 1960s, joining Rhodesian Front and representing the Salisbury suburb of Borrowdale as a member of parliament from 1965 to 1979. In the years following Zimbabwe's independence and the demise of Rhodesia, he emigrated to South Africa and engaged in general practice, dying there in 1999.