List of champions of the 1886 U.S. National Championships (now known as the US Open). The tournament was held from 23 August to 28 August on the outdoor Grass courts at the Newport Casino in Newport, Rhode Island. It was the 6th U.S. National Championships and the second Grand Slam tournament of the year.

Richard D. Sears defeated R. Livingston Beeckman 4-6, 6-1, 6-3, 6-4

Richard D. Sears / James Dwight defeated Howard Taylor / Godfrey Brinley 7–5, 5–7, 7–5, 6–4

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