The 1965–66 IHL season was the 21st season of the International Hockey League, a North American minor professional league. Six teams participated in the regular season, and the Port Huron Flags won the Turner Cup.
| GP | W | L | T | GF | GA | Pts | ||
|---|---|---|---|---|---|---|---|---|
| 70 | 46 | 19 | 5 | 376 | 314 | 97 | ||
| 70 | 38 | 26 | 6 | 312 | 259 | 82 | ||
| 70 | 34 | 32 | 4 | 308 | 274 | 72 | ||
| 70 | 33 | 35 | 2 | 347 | 322 | 68 | ||
| 70 | 29 | 40 | 1 | 263 | 319 | 59 | ||
| 70 | 20 | 48 | 2 | 248 | 366 | 42 |