| Competition: | 10th America's Cup |
| Image Alt: | Black and white photograph of two yachts racing under full sail |
| Defender Country: | United States |
| Defender Flag Variant: | 1899 |
| Defender Burgee: | Burgee of the New York Yacht Club.svg |
| Defender Club: | New York Yacht Club |
| Defender Yacht: | Columbia |
| Challenger Country: | United Kingdom |
| Challenger Flag Variant: | civil |
| Challenger Burgee: | Burgee of royal ulster yc.svg |
| Challenger Club: | Royal Ulster Yacht Club |
| Challenger Yacht: | Shamrock |
| Location: | New York Harbor |
| Coordinates: | 40.6667°N -76°W |
| Dates: | 1899 |
| Rule: | Seawanhaka |
| Winning Club: | New York Yacht Club |
| Score: | 3–0 |
| Next: | 1901 |
| Prev: | 1895 |
The 1899 America's Cup was the 10th challenge for the Cup. It took place in the New York City harbor and consisted of a best of five series of races between the defender, Columbia, entered by the New York Yacht Club, and Sir Thomas Lipton's Shamrock, representing the Royal Ulster Yacht Club. Columbia won all three races against Shamrock.
Guglielmo Marconi transmitted the event on radio from New York Harbor, making the cup perhaps the first sports broadcasting.[1]