Jefferson County
New York
Fishing
| Water | Species | Open Season | Minimum Length | Daily Limit | Method |
| All waters except as listed below | Trout | April 1 through Oct 15 | Any size | 5 – with no more than 2 longer than 12″ | |
| All waters except Sandy Pond | Yellow Perch & Sunfish | All year | Any size | Any number | |
| All waters except Black River and Indian River | Black Bass | 3rd Sat in June through Nov 30 | 12″ | 5 | |
| Fishing for black bass (including catch & release) is prohibited outside of the open season. | |||||
| Black River from Dexter Dam upstream, Indian River | Black Bass | 3rd Sat in June through Nov 30 | 10″ | 5 | |
| Fishing for black bass (including catch & release) is prohibited outside of the open season. | |||||
| Walleye | Statewide Angling Regulations Apply | ||||
| Black River from upstream tip of lower-most island to Mill St. Dam in Watertown | |||||
| Sandy Pond | Yellow Perch & Sunfish | All year | Any size | 50 of each | Ice fishing permitted |
| Clear Lake, Grass Lake, Hyde Lake, Sixtown Pond, Butterfield Lake | Walleye | 1st Sat in May through March 15 | 18″ | 3 | Ice fishing permitted |
| Lake-of-the-Woods, Sixberry Lake | Lake Trout | All year | 21″ | 3 | Ice fishing permitted |
| LL Salmon | All year | 15″ | 3 | ||
| Lake Ontario, St. Lawrence River, and their tributaries to first barrier | |||||
| Perch Lake | Closed to all fishing from March 2 through Nov 30. | Ice fishing permitted from Dec 1 through March 1. General angling regulations minimum lengths and daily limits apply | |||
| Millsite Lake | LL Salmon | All year | 15″ | 3 | Ice fishing permitted |
| Trout | All year | 12″ | 3 | ||
| Lake Trout | April 1 through Oct 15 | 21″ | 3 | ||