The 1916 U.S. National Championships (now known as the US Open) took place on the outdoor grass courts at the West Side Tennis Club, Forest Hills in New York City, United States. The men's singles tournament ran from August 28 until September 5 while the women's singles and doubles championship took place from June 5 to June 12 at the Philadelphia Cricket Club in Chestnut Hill. It was the 36th staging of the U.S. National Championships, and the only Grand Slam tennis event of the year.

Finals

Men's singles

🇺🇸 R. Norris Williams defeated 🇺🇸 William Johnston 4–6, 6–4, 0–6, 6–2, 6–4

Women's singles

🇳🇴 Molla Bjurstedt defeated 🇺🇸 Louise Hammond Raymond 6–0, 6–1

Men's doubles

🇺🇸 Bill Johnston / 🇺🇸 Clarence Griffin defeated 🇺🇸 Maurice McLoughlin / 🇺🇸 Ward Dawson 6–4, 6–3, 5–7, 6–3

Women's doubles

🇳🇴 Molla Bjurstedt / 🇺🇸 Eleonora Sears defeated 🇺🇸 Louise Hammond Raymond / 🇺🇸 Edna Wildey 4–6, 6–2, 10–8

Mixed doubles

🇺🇸 Eleonora Sears / 🇺🇸 Willis Davis defeated 🇺🇸 Florence Ballin / 🇺🇸 Bill Tilden 6–4, 7–5