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 (NHL) 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 (NHLD) 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 (NPS), 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.^[1] 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.^[2] 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.^[1] 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.^[2]

All NHLs are also included on the National Register of Historic Places (NRHP), 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.^[1]

Tabular listing

Most landmark designations are in one of the 50 states. New York is the state with the most (270), 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 (New York City, Philadelphia, and Boston) 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 (the nation's first foreign public property), is found in the unaffiliated Kingdom of Morocco.

State or region	Number of landmarks	Earliest declared^[3]	Latest declared^[3]
Alabama	39	October 9, 1960	January 13, 2021
Alaska	50	January 20, 1961	December 23, 2016
Arizona	47^[4]^[5]	October 9, 1960	December 23, 2016
Arkansas	17	October 9, 1960	July 31, 2003
California	146^[6]^[5]	October 9, 1960	December 11, 2023
Colorado	28^[7]	December 19, 1960	December 11, 2023
Connecticut	65	October 9, 1960	December 11, 2023
Delaware	14	January 20, 1961	December 23, 2016
Florida	47	October 9, 1960	January 13, 2021
Georgia	49	January 20, 1961	July 21, 2015
Hawaii	33	December 29, 1962	March 29, 2007
Idaho	11^[8]	October 9, 1960	December 11, 2023
Illinois	88^[9]	October 9, 1960	December 11, 2023
Indiana	44	October 9, 1960	December 11, 2023
Iowa	28^[10]	June 30, 1960	December 11, 2023
Kansas	26	December 19, 1960	December 23, 2016
Kentucky	32^[11]	December 19, 1960	February 27, 2013
Louisiana	53	October 9, 1960	July 21, 2015
Maine	44	October 9, 1960	August 25, 2014
Maryland	76^[12]	October 9, 1960	January 13, 2021
Massachusetts (Boston alone)	192 (57)	October 9, 1960	December 11, 2023
Michigan	42	October 9, 1960	January 13, 2021
Minnesota	25	December 19, 1960	June 23, 2011
Mississippi	40^[13]	July 19, 1964	February 16, 2017
Missouri	37^[9]	October 9, 1960	March 29, 2007
Montana	28^[8]^[14]	October 9, 1960	July 21, 2015
Nebraska	22	December 19, 1960	January 13, 2021
Nevada	8^[4]	January 20, 1961	October 16, 2012
New Hampshire	23	October 9, 1960	February 27, 2013
New Jersey	58^[15]^[16]	October 9, 1960	August 25, 2014
New Mexico	46^[7]	October 9, 1960	October 16, 2012
New York (New York City alone)	276^[15]^[17] (116)	October 9, 1960	January 13, 2021
North Carolina	39	November 5, 1961	December 23, 2016
North Dakota	7^[14]	July 4, 1961	December 23, 2016
Ohio	76^[11]^[18]	October 9, 1960	December 23, 2016
Oklahoma	22	December 19, 1960	February 27, 2013
Oregon	17^[6]^[19]	January 20, 1961	July 25, 2011
Pennsylvania (Philadelphia alone)	169^[16]^[18]^[17] (67)	January 20, 1961	December 23, 2016
Rhode Island	45	October 9, 1960	October 16, 2012
South Carolina	76	October 9, 1960	March 29, 2007
South Dakota	16^[10]	July 4, 1961	June 17, 2011
Tennessee	32^[13]	October 9, 1960	December 23, 2023
Texas	50	December 19, 1960	December 11, 2023
Utah	14	January 20, 1961	June 23, 2011
Vermont	18	September 22, 1960	August 25, 2014
Virginia	123	October 7, 1960	January 13, 2021
Washington	24^[19]	July 4, 1961	August 19, 2008
West Virginia	17	July 19, 1964	December 11, 2023
Wisconsin	45	October 9, 1960	December 11, 2023
Wyoming	28	December 19, 1960	December 11, 2023
District of Columbia	76^[12]	December 19, 1960	December 11, 2023
U.S. Commonwealths and Territories^[20]	17	October 9, 1960	March 11, 2013
Associated States^[21]	5	December 17, 1982	September 16, 1985
Foreign States^[22]	1	December 17, 1982	December 17, 1982
Duplicates	(20)
Total	2,633	June 30, 1960	December 11, 2023