The 1902 United States National Championships was a Grand Slam tennis tournament that took place in June and August of 1902. The men's tournament was held from August 18 to August 27 on the outdoor grass courts at the Newport Casino in Newport, Rhode Island. The women's tournament was held from June 24 to June 27 on the outdoor grass courts at the Philadelphia Cricket Club in Philadelphia, Pennsylvania, United States. It was the 22nd U.S. National Championships and the second Grand Slam tournament of the year. William Larned and Marion Jones won the singles titles.