Where does this most inbred states data come from?

Name: Most Inbred States
Creator: Rankodex

Rankodex compiles it from World Population Review and the primary sources it cites: Cousin marriage law in the United States - Wiki.

State rankings

Most Inbred States

Most Inbred States: compare 49 US states on 9 metrics.

Population49 states · 9 metricsUpdated Jun 10, 2026Original page

1 source

Cousin marriage law in the United States - Wiki

First-Cousin Marriages Allowed

3 values across 49 entries

First-Cousin Marriages Void

3 values across 49 entries

First-Cousin Sexual Relations or Cohabitation Allowed

2 values across 49 entries

First-Cousin-Once-Removed Marriages Allowed

4 values across 49 entries

Half-Cousin Marriages Allowed

6 values across 49 entries

Adopted-Cousin Marriages Allowed

4 values across 49 entries

Data

Click a column to sort.

49 states


Alabama	Yes	—	No	Yes
Alaska	Yes	—	No	Yes
Arizona	Legal w/ Restrictions	Only if both parties are 65 or older or one is infertile.	Yes	No
Arkansas	No	—	Yes	Yes
California	Yes	—	No	Yes
Colorado	Yes	—	No	Yes
Delaware	No	—	Yes	Yes
District of Columbia	Yes	—	No	Yes
Florida	Yes	—	No	Yes
Georgia	Yes	—	No	Yes
Hawaii	Yes	—	No	Yes
Idaho	No	—	Unknown	Yes
Illinois	Legal w/ Restrictions	Only if both parties are 50 or older, or if one of the parties is infertile.	No	Yes
Indiana	Legal w/ Restrictions	Only if both parties are 65 or older.	Yes	Yes
Iowa	No	—	Yes	Yes
Kansas	No	—	Yes	Yes
Kentucky	No	—	Yes	No
Louisiana	No	—	Yes	Yes
Maine	Legal w/ Restrictions	Proof of genetic counseling from a genetic counselor required.	No	Yes
Maryland	Yes	—	No	Yes
Massachusetts	Yes	—	No	Yes
Michigan	No	—	Yes	Yes
Minnesota	Legal w/ Restrictions	Only certain types.	Yes	Yes
Mississippi	No	—	Yes	No
Missouri	No	—	Yes	Yes
Montana	No	—	Yes	Yes
Nebraska	No	—	Yes	Yes
Nevada	No	—	Yes	No
New Hampshire	No	—	Yes	Yes
New Jersey	Yes	—	No	Yes
New Mexico	Yes	—	No	Yes
New York	Yes	—	No	Yes
North Dakota	No	—	Yes	No
Ohio	No	—	No	Yes
Oklahoma	No	—	Yes	Yes
Oregon	No	—	Yes	Yes
Pennsylvania	No	—	Yes	Yes
Rhode Island	Yes	—	No	Yes
South Carolina	Yes	—	No	Yes
South Dakota	No	—	Yes	No
Tennessee	Yes	—	Yes	Yes
Texas	No	—	No	No
Utah	Legal w/ Restrictions	Only if both parties are 65 or older or both are 55 or older with a district court finding of infertility of either party.	Yes	No
Vermont	Yes	—	No	Yes
Virginia	Yes	—	No	Yes
Washington	No	—	Yes	Yes
West Virginia	No	—	Unknown	Yes
Wisconsin	Legal w/ Restrictions	Only if the woman is at least 55 or either is permanently sterile.	No	No
Wyoming	No	—	Yes	Yes

Quick answers

Where does this most inbred states data come from?: Rankodex compiles it from World Population Review and the primary sources it cites: Cousin marriage law in the United States - Wiki.