1925 U.S. National Championships (tennis)

{{Use mdy dates|date=July 2023}}

{{Use American English|date=July 2023}}

{{TennisEventInfo|1925|U.S. National Championships|

| date = September 14–19 (M)
August 17–24 (W)

| edition = 45th

| category = Grand Slam (ITF)

| location = Forest Hills, Queens
New York City, New York

| venue=West Side Tennis Club

| surface = Grass

| champms={{flagicon|USA|1912}} Bill Tilden{{cite book|last=Collins|first=Bud|title=The Bud Collins History of Tennis|year=2010|publisher=New Chapter Press|location=[New York]|isbn=978-0942257700|edition=2nd|pages=454–483}}

| champws={{flagicon|USA|1912}} Helen Wills Moody

| champmd={{flagicon|USA|1912}} Richard Norris Williams / {{flagicon|USA|1912}} Vincent RichardsCollins, p. 477

| champwd={{flagicon|USA|1912}} Mary Browne / {{flagicon|USA|1912}} Helen WillsCollins, p. 479

| champxd={{flagicon|GBR}} Kitty McKane / {{flagicon|AUS}} Jack HawkesCollins, p. 482

}}

The 1925 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 women's tournament was held from August 17 until August 24 while the men's tournament ran from September 14 until September 19. It was the 45th staging of the U.S. National Championships and the fourth Grand Slam tennis event of the year.