Category:Historic districts in the United States by state

• Historic districts on the National Register of Historic Places by state (50 C)
• Historic districts in the United States by state and populated place (5 C)

A

• Historic districts in Alabama (3 C)
• Historic districts in Alaska (2 C, 1 P)
• Historic districts in Arizona (1 C, 9 P)
• Historic districts in Arkansas (3 C, 1 P)

C

• Historic districts in California (4 C, 19 P)
• Historic districts in Colorado (1 C, 7 P)
• Historic districts in Connecticut (2 C, 17 P)

D

• Historic districts in Delaware (2 C, 4 P)

F

• Historic districts in Florida (3 C, 9 P)

G

• Historic districts in Georgia (U.S. state) (4 C, 8 P)

H

• Historic districts in Hawaii (1 C, 1 P)

I

• Historic districts in Idaho (1 C)
• Historic districts in Illinois (5 C, 10 P)
• Historic districts in Indiana (3 C)
• Historic districts in Iowa (3 C)

K

• Historic districts in Kansas (1 C, 3 P)
• Historic districts in Kentucky (2 C, 2 P)

L

• Historic districts in Louisiana (1 C, 2 P)

M

• Historic districts in Maine (2 C, 1 P)
• Historic districts in Maryland (3 C, 3 P)
• Historic districts in Massachusetts (2 C)
• Historic districts in Michigan (3 C, 13 P)
• Historic districts in Minnesota (2 C, 3 P)
• Historic districts in Mississippi (2 C, 1 P)
• Historic districts in Missouri (2 C, 3 P)
• Historic districts in Montana (1 C, 3 P)

N

• Historic districts in Nebraska (2 C, 1 P)
• Historic districts in Nevada (1 C, 6 P)
• Historic districts in New Hampshire (2 C, 1 P)
• Historic districts in New Jersey (2 C, 4 P)
• Historic districts in New Mexico (1 C, 10 P)
• Historic districts in New York (state) (4 C, 2 P)
• Historic districts in North Carolina (2 C, 6 P)
• Historic districts in North Dakota (2 C)

O

• Historic districts in Ohio (2 C, 10 P)
• Historic districts in Oklahoma (1 C, 4 P)
• Historic districts in Oregon (1 C, 2 P)

P

• Historic districts in Pennsylvania (3 C, 1 P)

R

• Historic districts in Rhode Island (2 C, 2 P)

S

• Historic districts in South Carolina (2 C, 1 P)
• Historic districts in South Dakota (2 C)

T

• Historic districts in Tennessee (2 C, 6 P)
• Historic districts in Texas (2 C, 11 P)

U

• Historic districts in Utah (2 C, 4 P)

V

• Historic districts in Vermont (3 C, 2 P)
• Historic districts in Virginia (4 C, 24 P)

W

• Historic districts in Washington (state) (2 C, 1 P)
• Historic districts in West Virginia (3 C, 1 P)
• Historic districts in Wisconsin (1 C, 1 P)
• Historic districts in Wyoming (1 C, 1 P)