List of champions of the 1887 U.S. National Championships (now known as the US Open).

The men's tournament was held from August 22 to August 30 on the outdoor grass courts at the Newport Casino in Newport, Rhode Island.

It was the 7th U.S. National Championships and the second Grand Slam tournament of the year.

The event was launched at the Philadelphia Cricket Club, PA and was played after the men's tournament had ended.

[2] Richard Sears defeated Henry Slocum 6–1, 6–3, 6–2 Ellen Hansell defeated Laura Knight 6–1, 6–0 Richard Sears / James Dwight defeated Howard Taylor / Henry Slocum 6–4, 3–6, 2–6, 6–3, 6–3