1966 U.S. Open (golf) Third round Third round

| Place | Player | Country | Score | To_par |
|---|---|---|---|---|
| 1 | Arnold Palmer | United States | 71-66-70=207 | –3 |
| 2 | Billy Casper | United States | 69-68-73=210 | E |
| 3 | Jack Nicklaus | United States | 71-71-69=211 | +1 |
| T4 | Phil Rodgers | United States | 70-70-73=213 | +3 |
| T4 | Dave Marr | United States | 71-74-68=213 | +3 |
| 6 | Rives McBee | United States | 76-64-74=214 | +2 |
| T7 | Tony Lema | United States | 71-74-70=215 | +5 |
| T7 | Bob Goalby | United States | 71-73-71=215 | +5 |
| T7 | Al Mengert | United States | 67-77-71=215 | +5 |
| 10 | Johnny Miller (a) | United States | 70-72-74=216 | +6 |