Ptolemy Alexander Reid (May 8, 1918[1] – September 2, 2003) was a Guyanese veterinarian and politician who served as Prime Minister of Guyana from 1980 to 1984.

He was born in Dartmouth, British Guiana[2] attending the village primary school where he eventually became a teacher before entering the Cyril Potter College of Education (known at the time as the Teachers' Training College).

[3] Reid studied veterinary medicine at the Tuskegee Institute in Alabama, then returned to Guyana in 1955, and married Ruth Chalmers.

[3] Unable to find employment in British Guiana,[4] he moved to England where he became a member of the Royal College of Veterinary Surgeons, and then practiced in the Canadian province of Saskatchewan.

[1] He returned to Guyana in 1958 and took on a position at Bookers Sugar Estate as the Chief Veterinary Officer,[3] and became involved in politics in 1960 when he joined the People's National Congress.