| Regular Season: Week 1 |
 Browns |
at |
 Redskins |
Sunday, September 11, 1966 |
3:00PM |
CLE 38, WAS 14 |
| Regular Season: Week 2 |
 Packers |
at |
Browns |
Sunday, September 18, 1966 |
3:00PM |
GB 21, CLE 20 |
| Regular Season: Week 3 |
 Cardinals |
at |
Browns |
Sunday, September 25, 1966 |
3:00PM |
STL 34, CLE 28 |
| Regular Season: Week 4 |
Browns |
at |
 Giants |
Sunday, October 2, 1966 |
3:00PM |
CLE 28, NYG 7 |
| Regular Season: Week 5 |
 Steelers |
at |
Browns |
Saturday, October 8, 1966 |
3:00PM |
PIT 10, CLE 41 |
| Regular Season: Week 7 |
 Cowboys |
at |
Browns |
Sunday, October 23, 1966 |
3:00PM |
DAL 21, CLE 30 |
| Regular Season: Week 8 |
Browns |
at |
 Falcons |
Sunday, October 30, 1966 |
2:00PM |
CLE 49, ATL 17 |
| Regular Season: Week 9 |
Browns |
at |
Steelers |
Sunday, November 6, 1966 |
3:00PM |
CLE 6, PIT 16 |
| Regular Season: Week 10 |
 Eagles |
at |
Browns |
Sunday, November 13, 1966 |
3:00PM |
PHI 7, CLE 27 |
| Regular Season: Week 11 |
Redskins |
at |
Browns |
Sunday, November 20, 1966 |
3:00PM |
WAS 3, CLE 14 |
| Regular Season: Week 12 |
Browns |
at |
Cowboys |
Thursday, November 24, 1966 |
3:00PM |
CLE 14, DAL 26 |
| Regular Season: Week 13 |
Giants |
at |
Browns |
Sunday, December 4, 1966 |
3:00PM |
NYG 40, CLE 49 |
| Regular Season: Week 14 |
Browns |
at |
Eagles |
Sunday, December 11, 1966 |
3:00PM |
CLE 21, PHI 33 |
| Regular Season: Week 15 |
Browns |
at |
Cardinals |
Saturday, December 17, 1966 |
3:00PM |
CLE 38, STL 10 |