Do firearm transport in vehicle rules differ by state?

Yes. Vehicle transport posture Crosstatelaws maps all 50 states for travelers who are physically in that state — not for what a state requires of its own plates or licenses.

Does firearm transport in vehicle apply if my vehicle is registered in another state?

Operate-here rules (speed, helmets, possession, inspections you must stop for) follow the state you are in. Registration-state rules such as a front license plate do not. Read the layer notes on the map.

Where can I see a firearm transport in vehicle map?

Open the Crosstatelaws interactive map with this layer soloed: https://crosstatelaws.com/?solo=firearm_transport

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Firearm transport in vehicle laws by state

People search “Firearm transport in vehicle by state”, “Firearm transport in vehicle laws by state”, and “Gun transport map” when a road trip, boat, bike, or load is about to cross a line. This page is the 50-state index for firearm transport in vehicle. Colors and quotes are written for someone in that state today, not for what that state demands of its own registered vehicles.

Open the Gun transport difference map

How states differ

Vehicle transport posture.

Generally permissive if possession is legal
Unload / case / inaccessible expected
Strict transport (locked case / limited locations)

Searches this page is meant to answer

If you typed any of these — or a close variant with a state name — this is the Crosstatelaws topic that should show up:

Firearm transport in vehicle by state
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Firearm transport in vehicle in California / Texas / Florida / New York
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All 50 states

One-line traveler summary for each state. Open the map for the quoted rule and footnotes.

Alabama (AL): Alabama: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Alaska (AK): Alaska: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Arizona (AZ): Arizona: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Arkansas (AR): Arkansas: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
California (CA): California: unloaded in a locked container (Pen. Code § 25610); ammo not in the gun.
Colorado (CO): Colorado: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Connecticut (CT): Connecticut: unloaded and in a locked case or the trunk (Conn. Gen. Stat. § 29-38).
Delaware (DE): Delaware: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Florida (FL): Florida: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Georgia (GA): Georgia: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Hawaii (HI): Hawaii: permit-to-acquire plus locked, unloaded transport (Haw. Rev. Stat. § 134-25).
Idaho (ID): Idaho: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Illinois (IL): Illinois: unloaded, enclosed case or broken down, not immediately accessible; FOID or CCL still required to possess (720 ILCS 5/24-1.6; 430 ILCS 65).
Indiana (IN): Indiana: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Iowa (IA): Iowa: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Kansas (KS): Kansas: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Kentucky (KY): Kentucky: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Louisiana (LA): Louisiana: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Maine (ME): Maine: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Maryland (MD): Maryland: unloaded and locked / cased without a wear-and-carry permit (Crim. Law § 4-203).
Massachusetts (MA): Massachusetts: unloaded and enclosed; LTC/FID required to possess (ch. 140, § 131C).
Michigan (MI): Michigan: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Minnesota (MN): Minnesota: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Mississippi (MS): Mississippi: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Missouri (MO): Missouri: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Montana (MT): Montana: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Nebraska (NE): Nebraska: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Nevada (NV): Nevada: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
New Hampshire (NH): New Hampshire: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
New Jersey (NJ): New Jersey: unloaded in a locked case; FID/permit rules apply (N.J.S.A. 2C:39-6).
New Mexico (NM): New Mexico: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
New York (NY): New York: unloaded in a locked container; license rules apply (Penal Law § 265.01-b).
North Carolina (NC): North Carolina: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
North Dakota (ND): North Dakota: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Ohio (OH): Ohio: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Oklahoma (OK): Oklahoma: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Oregon (OR): Oregon: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Pennsylvania (PA): Pennsylvania: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Rhode Island (RI): Rhode Island: unloaded in a locked case; license rules apply (R.I. Gen. Laws § 11-47-8).
South Carolina (SC): South Carolina: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
South Dakota (SD): South Dakota: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Tennessee (TN): Tennessee: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Texas (TX): Texas: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Utah (UT): Utah: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Vermont (VT): Vermont: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Virginia (VA): Virginia: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Washington (WA): Washington: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
West Virginia (WV): West Virginia: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.
Wisconsin (WI): Wisconsin: unload and case (or trunk) unless a carry permit / permitless carry theory covers the gun. FOPA 18 U.S.C. § 926A for through-trips.
Wyoming (WY): Wyoming: a lawfully possessed handgun may be in the vehicle loaded if carry is lawful. FOPA 18 U.S.C. § 926A still governs a through-trip into a strict neighbor.

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Not legal advice. Confirm statutes before you travel. Disclaimer.