Which states allow common law marriage?

These are the only states that allow couples to create a common law marriage:

Alabama

Colorado

District of Columbia

Georgia (if created before 1/1/97)

Idaho (if created before 1/1/96)

Iowa

Kansas

Montana

New Hampshire (for inheritance purposes only)

Ohio (if created before 10/10/91)

Oklahoma

Pennsylvania (if created before 1/1/05)

Rhode Island

South Carolina

Texas

Utah