Deer hunting caliber rules in Maryland
What Maryland allows you to shoot a deer with, in plain English, taken from the state's own regulation and quoted below so you can check our reading against it.
A plain-English summary, last reviewed September 2026. Hunting law changes every year and varies by zone, season and public versus private land, and this page is not legal advice. Before you hunt, confirm the current rule with Maryland DNR Wildlife and Heritage Service.
The answer changes with the county, zone or land you hunt, so the map matters more than the cartridge.
The rule as Maryland writes it
During Firearms Season and Junior Hunt Days, shotguns (28 gauge or larger, single projectile except #1 buckshot in Dorchester County), rifles and handguns firing straight-walled cartridges, muzzleloaders (.40 or larger), air guns and archery may be used in all counties; rifles and handguns that shoot bottleneck cartridges may be used only in certain counties and locations shown on the DNR map; handguns need a 6-inch barrel and 700 ft-lb; Frederick and Worcester have shotgun/straight-wall-only zones.
Is a .223 legal for deer in Maryland?
A .223 is a bottleneck cartridge, and bottleneck rifles may be used only in the counties and areas the agency lists. Straight-wall rifles are legal in every county. Check the county map before you assume your rifle travels.
What is the minimum caliber for deer in Maryland?
It depends where in Maryland you hunt: no statewide caliber minimum: straight-wall rifles are legal in every county, bottleneck rifles only in the counties the agency's map allows. The rule in full, including the shotgun and muzzleloader options, is quoted at the top of this page, and the regulation itself is linked in the sources.
What a zoned rule means for your rifle
In this state the answer starts with a map. Some counties or zones allow centerfire rifles, others are shotgun, muzzleloader or straight-wall country, and the line between them is drawn by the agency and redrawn from time to time.
Find your zone first, then read the implement list for that zone and that season. A rifle that is legal in one county is a citation two townships away, and the boundary is often a road rather than anything you can see from a stand.
If you hunt several properties, check each one. Hunters who get caught out are usually the ones who learned the rule where they grew up and assumed it travelled with them.
Caliber is the smallest part of a clean kill. Work out what your cartridge carries at the range you hunt with the cartridge and energy guide or the cartridge comparison tool, then put the shot where it counts.
States with the same kind of rule
The answer changes with the county, zone or land you hunt, so the map matters more than the cartridge.
The full picture is in the 50-state deer caliber table, and the regulations hub has the agency directory and a pre-hunt legal checklist.
Sources
We read this state's rule from the source below in September 2026 and quoted it above:
- Maryland Guide to Hunting and Trapping - Deer Regs for Archery, Muzzleloader, Firearms and Airguns
- Maryland DNR Wildlife and Heritage Service - the agency that publishes and enforces it.
Rules are summarised for orientation and change often; the official regulation linked above is the authority. Zones, seasons and local ordinances can add to the statewide rule: the regulations hub has the pre-hunt legal checklist.
Range-day gear, whatever your state allows
The rule quoted above tells you what is legal; these are the tools that make any legal setup accurate enough to matter.
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