2026 regulation year
Merrimack River 2026 — Massachusetts Fishing Regulations
Massachusetts statewide rules apply unless overridden below.
Last updated
Merrimack River carries 2 special-regulation overlays on top of Massachusetts's 2026 fishing rules — covering Smallmouth bass. Verify the agency booklet before launching: in-season changes are not yet wired to this page.
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State-level special regulation
North-coast major river; smallmouth bass + striped bass (tidal lower reach) + American shad spring spawn + Atlantic sturgeon protected; 12 in min smallmouth + 5 / day combined; tidal reach below Haverhill requires MA Saltwater Permit for striper
Source: Massachusetts special-water list
Per-species rules on Merrimack River
12 in min, 5 / day combined; north-coast river smallmouth
Official source
Massachusetts Division of Fisheries & Wildlife (freshwater) + MA Division of Marine Fisheries (saltwater) publishes the authoritative 2026 Massachusetts fishing regulations. Special-regulation lakes and rivers are listed in the agency booklet — always verify before fishing.
Visit official Massachusetts fishing regulations →
Emergency-order channel
In-season closures, slot-limit changes, and run-count-driven harvest pauses are posted to Massachusetts Division of Fisheries & Wildlife's emergency-order feed — check it before any Massachusetts trip during the active season.
Other special-regulation waters in Massachusetts
Frequently asked questions
- What special fishing regulations apply at Merrimack River?
- Merrimack River carries 2 special-regulation overlays that override Massachusetts' statewide 2026 rules, covering Smallmouth bass. One of them reads: "North-coast major river; smallmouth bass + striped bass (tidal lower reach) + American shad spring spawn + Atlantic sturgeon protected; 12 in min smallmouth + 5 / day combined; tidal reach below Haverhill requires MA Saltwater Permit for striper." Every overlay on this water body is listed in full above.
- Do I need a fishing license to fish Merrimack River?
- Yes. Merrimack River is in Massachusetts, so a valid Massachusetts fishing license is required just as it is anywhere else in the state, issued by Massachusetts Division of Fisheries & Wildlife (freshwater) + MA Division of Marine Fisheries (saltwater). The special regulations on this page change the bag, size, slot, or gear rules for Merrimack River; they do not waive the license requirement. Free-fishing days and youth exemptions follow the statewide Massachusetts rules.
- Do Merrimack River's special rules replace Massachusetts' statewide limits?
- Only where they conflict. Massachusetts' statewide 2026 regulations apply on Merrimack River by default; the overlays above replace the matching statewide rules for the species or gear they name, while everything not specifically overridden still follows the statewide rule. When a water-body rule and the statewide rule disagree, the water-body rule wins.
- Which species have special rules on Merrimack River?
- Smallmouth bass has a water-body-specific rule on Merrimack River, each linking to its full Massachusetts regulations above. Species not listed here follow the statewide Massachusetts limits.