The 1870 America's Cup was the first America's Cup to be hosted in the United States,^[1] and the first "America's Cup" due to the trophy being renamed from the 100 Guineas Cup of 1851. It was the first competition after the founding of the "America's Cup" event with the deed of gift in 1857.

1st America's Cup

Defender  United States
Defender club:	New York Yacht Club
Yacht:	17 schooners, including Magic
Challenger  United Kingdom
Challenger club:	Royal Thames Yacht Club
Yacht:	Cambria
Competition
Location:	Newport, Rhode Island, United States
Dates:	1870
Winner:	New York Yacht Club
Score:	1–0
← 1851 1871 →

James Lloyd Ashbury's yacht Cambria sailed to New York on behalf of the Royal Thames Yacht Club.

The New York Yacht Club entered 17 schooners, and the race was won by Franklin Osgood's Magic.

The course of the race was from the Club House, Staten Island, N.Y. around the S.W. Spit to and the light ship off Sandy Hook and back, 40 miles. Seventeen American and the English yacht Cambria started at 11.21 A. M. The race was won by Magic, which rounded the home stake boat in 3 hours, 33 minutes, 54 seconds. The Yachts Tidal Wave, Widgeon, and Alarm failed to complete the race and were ruled out.