The 1936 U.S. National Championships (now known as the US Open) was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club, Forest Hills in New York City, United States.

The tournament ran from September 3 until September 12.

It was the 56th staging of the U.S. National Championships and the fourth Grand Slam tennis event of the year.

[1] Fred Perry's victory would remain as the last Grand Slam tournament won by a British man until Andy Murray won the US Open in 2012, 76 years apart.

[2][3] Fred Perry defeated Don Budge 2–6, 6–2, 8–6, 1–6, 10–8 Alice Marble defeated Helen Jacobs 4–6, 6–3, 6–2 Don Budge / Gene Mako defeated Wilmer Allison / John Van Ryn 6–4, 6–2, 6–4 [4] Carolin Babcock / Marjorie Gladman Van Ryn defeated Helen Hull Jacobs / Sarah Palfrey Cooke 9–7, 2–6, 6–4 [5] Alice Marble / Gene Mako defeated Sarah Palfrey Cooke / Don Budge 6–3, 6–2 [6]