Colin Sinclair (born December 19, 1994) is an American tennis player representing the Northern Mariana Islands.

Additionally, he has won three singles and eight doubles titles on the ITF Tour.

He represents the Northern Mariana Islands in Davis Cup as part of the Pacific Oceania team since 2017 and has a career record of 18–5 (13–3 in singles, 5–2 in doubles) in the competition.

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