List of U.S. National Historic Landmarks by state

The United States National Historic Landmark Program is designed to recognize and honor the nation's cultural and historical heritage. The program was formally inaugurated with a series of listings on October 9, 1960; as of August 21, 2020, there are 2,597 designated landmarks. A National Historic Landmark is generally a building, district, object, site, or structure, that is officially recognized by the United States government for its national historical significance. A National Historic Landmark District is a historic district that is recognized as an NHL. Its geographic area may include contributing properties that are buildings, structures, sites or objects, and it may include non-contributing properties.
The program is administered by the National Park Service, a branch of the Department of the Interior. The National Park Service determines which properties meet NHL criteria and makes nomination recommendations after an owner notification process. The secretary of the interior reviews nominations and, based on a set of predetermined criteria, makes a decision on NHL designation or a determination of eligibility for designation. Both public and privately owned properties can be designated as NHLs. This designation provides indirect, partial protection of the historic integrity of the properties via tax incentives, grants, monitoring of threats, and other means. Owners may object to the nomination of the property as an NHL. When this is the case the secretary of the interior can only designate a site as eligible for designation.
All NHLs are also included on the National Register of Historic Places, a list of some 80,000 historic properties that the National Park Service deems to be worthy of recognition. The primary difference between an NHL and a NRHP listing is that the NHLs are determined to have national significance, while other NRHP properties are deemed significant at the local or state level.

Tabular listing

Most landmark designations are in one of the 50 states. New York is the state with the most, and New York City, with 114 designations, is the city with the largest number of designations. Of the states, North Dakota has the fewest designations with seven. Three cities have enough listings to warrant lists separate from their respective states.
A small number of designations have been made outside the 50 states. Most of these appear in United States possessions. The Virgin Islands have five listings, Puerto Rico has four, and island possessions in the South Pacific have six. Five listings are found in Pacific island nations with which the U.S. has established a free association agreement, and one listing, the American Legation in Tangier, is found in the unaffiliated Kingdom of Morocco.

State or region	Number of landmarks	Earliest declared	Latest declared	Example
Alabama	39
Alaska	50
Arizona	47
Arkansas	17
California	148
Colorado	29
Connecticut	65
Delaware	14
Florida	47
Georgia	49
Hawaii	32
Idaho	11
Illinois	88
Indiana	44
Iowa	29
Kansas	26
Kentucky	33
Louisiana	54
Maine	44
Maryland	76
Massachusetts	192
Michigan	42
Minnesota	25
Mississippi	40
Missouri	37
Montana	28
Nebraska	23
Nevada	8
New Hampshire	24
New Jersey	58
New Mexico	46
New York (New York City alone)	277
North Carolina	40
North Dakota	7
Ohio	76
Oklahoma	22
Oregon	17
Pennsylvania (Philadelphia alone)	169
Rhode Island	45
South Carolina	76
South Dakota	16
Tennessee	32
Texas	50
Utah	14
Vermont	18
Virginia	126
Washington	24
West Virginia	17
Wisconsin	45
Wyoming	28
District of Columbia	78
	19
	5
	1
Duplicates
Total	2,649