1881 U.S. National Championships (tennis)
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| 1881 U.S. National Championships | |
|---|---|
| Date | August 31 – September 3 Rfj |
| Edition | 1st |
| Surface | Grass |
| Venue | Newport Casino |
| Champions | |
| Singles | |
 Richard D. Sears | |
| Doubles | |
| Clarence Clark / Fred Taylor | |
The inaugural U.S. National Championship was a tennis tournament that took place in August 1881 at the Newport Casino, Newport, Rhode Island and in that first year only clubs that were members of the United States National Lawn Tennis Association were permitted to enter the tournament. A Men's Singles competition and a Men's Doubles competition were played, and Richard Sears became the first men's singles U.S. National Tennis Champion.
Champions
Men's Singles
Richard Sears defeated William E. Glyn 6–0, 6–3, 6–2
Men's Doubles
Clarence Clark / Fred Taylor defeated Arthur Newbold / Alexander Van Rensselaer, 6-5, 6-4, 6-5