1966 Cleveland Browns season Regular season schedule Regular season schedule

| Week | Date_ | Opponent | Result_ | Attendance |
|---|---|---|---|---|
| 1 | September 11, 1966 | at Washington Redskins | W 38–14 | 48643 |
| 2 | September 18, 1966 | Green Bay Packers | L 21–20 | 83943 |
| 3 | September 25, 1966 | St. Louis Cardinals | L 34–28 | 74814 |
| 4 | October 2, 1966 | at New York Giants | W 28–7 | 62916 |
| 5 | October 8, 1966 | Pittsburgh Steelers | W 41–10 | 82687 |
| 6 | Bye | Bye | Bye | Bye |
| 7 | October 23, 1966 | Dallas Cowboys | W 30–21 | 84721 |
| 8 | October 30, 1966 | at Atlanta Falcons | W 49–17 | 57235 |
| 9 | November 6, 1966 | at Pittsburgh Steelers | L 16–6 | 39690 |
| 10 | November 13, 1966 | Philadelphia Eagles | W 27–7 | 77698 |