The 1966 U.S. Open Championship was the 66th U.S. Open played June 16-20 at Olympic Club (Lake Course) in San Francisco, California. Billy Casper won the championship in an 18-hole playoff over Arnold Palmer (69 to 73).
| # | Player | Country | Score | To par | Winnings ($) |
|---|---|---|---|---|---|
| 1 | Billy Casper | United States | 69-68-73-68=278 | -2 | 26,500 |
| 2 | Arnold Palmer | United States | 71-66-70-71=278 | 14,000 | |
| 3 | Jack Nicklaus | United States | 71-71-69-74=285 | +5 | 9,000 |
| T4 | Tony Lema | United States | 71-74-70-71=286 | +6 | 6,500 |
| Dave Marr | United States | 71-74-68-73=286 | |||
| 6 | Phil Rodgers | United States | 70-70-73-74=287 | +7 | 5,000 |
| 7 | Bobby Nichols | United States | 74-72-71-72=289 | +9 | 4,000 |
| T8 | Wes Ellis | United States | 71-75-74-70=290 | +10 | 2,800 |
| Mason Rudolph | United States | 74-72-71-73=290 | |||
| Doug Sanders | United States | 70-75-74-71=290 | |||
| Johnny Miller (a) | United States | 70-72-74-74=290 | 0 |
| Preceded by 1966 Masters |
Major Championships | Succeeded by 1966 Open Championship |
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