1934 U.S. National Championships (tennis)

1934 U.S. National Championships
DateSeptember 1–12 (M)
August 13–18 (W)
Edition54th
CategoryGrand Slam (ITF)
SurfaceGrass / Outdoor
LocationForest Hills, Queens
New York City, New York
VenueWest Side Tennis Club
Champions
Men's singles
Fred Perry
Women's singles
Helen Jacobs
Men's doubles
George Lott / Lester Stoefen
Women's doubles
Helen Jacobs / Sarah Palfrey Cooke
Mixed doubles
Helen Jacobs / George Lott

The 1934 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, New York. The tournament ran from September 1 until September 12. It was the 54th staging of the U.S. National Championships and the fourth Grand Slam tennis event of the year. The men's and women's doubles events were held in Longwood Cricket Club in Chestnut Hill, Massachusetts.