| Constellation | |
| Nat: |  |
| Class: | 12-metre |
| Sailno: | US–20 |
| Designer: | Olin Stephens |
| Builder: | Minneford’s Yacht Yard Inc. |
| Launched: | 1964 |
| Owner: | Eric Ridder syndicate |
| Skip: | Eric Ridder and Bob Bavier |
| Wins: | 1964 America's Cup |
| Ac Year: | 1964 America's Cup |
| Cc Year: | 1964 America's Cup Defender Selections Series |
| Length: | 20.82m (68.31feet) (LOA) 14.05m (46.1feet) (LWL) |
| Beam: | 3.66m (12.01feet) |
| Sail: | 170m2 |
Constellation is an American 12-metre class racing yacht that successfully defended the 1964 America's Cup.
On 20 March 1964, Constellation completed a 4–0 victory over Sovereign in the 1964 America's Cup.[1]