New Mexico County Maps: Interactive History & Complete List

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Map of New Mexico Counties
Map of New Mexico county boundaries and county seats

Maps of New Mexico are a crucial element of genealogy and family tree research, especially in the event that you live far away from where your ancestor was living.

Due to the fact that New Mexico’s political borders have often changed throughout the years, historic maps are important in helping you discover the exact location of your ancestor’s hometown, exactly what land they owned, just who his or her neighbors ended up being, and much more besides.

Maps of New Mexico are an exceptional tool for getting started with your own research, given that they provide substantially important information and facts right away, and then present them in a clearly understandable manner.

New Mexico borders Arizona in the west, Colorado in the north, Oklahoma to the northeast, Texas (east), and Utah (northwest). The 10 largest cities in New Mexico are Albuquerque, Las Cruces, Santa Fe, Rio Rancho, Roswell, Farmington, Clovis, Hobbs, Alamogordo, and Carlsbad.

Learn more historical facts about New Mexico counties here.

Interactive Map of New Mexico County Formation History

AniMap Plus 3.0, with the permission of the Goldbug Company


List of Every New Mexico County

Bernalillo County

Established in 1852, Bernalillo County is the most populous county in New Mexico with a population of around 681,000. It is home to the state capital, Albuquerque, and contains many cultural and historical landmarks, such as the Petroglyph National Monument.

Catron County

Founded in 1921, Catron County is one of the largest counties in New Mexico, but also one of the least populous with around 3,500 residents. It is known for its scenic natural beauty, with the Gila Wilderness and other natural attractions.

Chaves County

Established in 1889, Chaves County has a population of around 64,000 and is situated in southeastern New Mexico. It is home to the city of Roswell, known for its UFO-related events and attractions.

Cibola County

Cibola County is one of the newer counties in New Mexico, having been established in 1981. It has around 27,000 residents and contains parts of the Cibola National Forest and the El Malpais National Monument.

Colfax County

Established in 1869, Colfax County is situated in northern New Mexico and has a population of around 12,000. It is home to the historic town of Cimarron and contains parts of the Carson National Forest.

Curry County

Founded in 1909, Curry County has a population of approximately 48,000 and is located in eastern New Mexico. It is home to the city of Clovis and contains parts of the Kiowa National Grassland.

De Baca County

Established in 1917, De Baca County is one of the smallest counties in New Mexico with around 1,800 residents. It is located in eastern New Mexico and is famous for its agricultural industry.

Doña Ana County

Founded in 1852, Doña Ana County is located in southern New Mexico and has a population of around 217,000. It is home to the city of Las Cruces, New Mexico State University, and parts of the Organ Mountains-Desert Peaks National Monument.

Eddy County

Established in 1889, Eddy County is situated in southeastern New Mexico and has around 59,000 residents. It is celebrated for its oil and gas industry and contains parts of the Carlsbad Caverns National Park.

Grant County

Founded in 1868, Grant County is located in southwestern New Mexico and is home to around 27,000 people. It is acclaimed for its scenic natural beauty, with attractions such as the Gila National Forest and the Gila Cliff Dwellings National Monument.

Guadalupe County

Established in 1891, Guadalupe County is located in eastern New Mexico and has a population of around 4,400. It is well-known for its agricultural industry and is home to the historic town of Santa Rosa.

Harding County

Established in 1921, Harding County is situated in northeastern New Mexico and has around 700 residents. It is one of the least populated counties in New Mexico and is valued for its vast grasslands and cattle ranching.

Hidalgo County:

Established in 1919, Hidalgo County is located in southwestern New Mexico and has a population of around 4,500. It is notable for its natural beauty, with attractions such as the Gila Wilderness and the Peloncillo Mountains.

Lea County

Founded in 1917, Lea County is located in southeastern New Mexico and has around 72,000 residents. It is known for its oil and gas industry and is home to the cities of Hobbs and Lovington.

Lincoln County

Established in 1869, Lincoln County is situated in south-central New Mexico and has a population of around 20,000. It is celebrated for its historic landmarks, such as the town of Lincoln and the Fort Stanton Historic Site.

Los Alamos County

Established in 1949, Los Alamos County is one of the smallest counties in New Mexico with a population of around 19,000. It is located in northern New Mexico and is famous for being the site of the Los Alamos National Laboratory.

Luna County

Luna County is located in southwestern New Mexico and was established in 1901. It has around 24,000 residents. It is valued for its agricultural industry and is home to the city of Deming.

McKinley County

Founded in 1901, McKinley County is located in northwestern New Mexico and has a population of around 71,000. It is home to the city of Gallup and contains parts of the Navajo Nation and Zuni Pueblo.

Mora County

Mora County was established in 1860 and is located in northeastern New Mexico. It has a population of around 5,000. It is known for its natural beauty, with attractions such as the Santa Fe National Forest and the Mora Valley.

Otero County

Otero County is situated in southern New Mexico and was established in 1899. It has a population of around 67,000. It is famous for its military history, with the White Sands Missile Range and Holloman Air Force Base located within its borders.

Quay County

Founded in 1903, Quay County is located in eastern New Mexico and has around 8,300 residents. It is acclaimed for its agricultural industry and is home to the town of Tucumcari.

Rio Arriba County

Established in 1852, Rio Arriba County is located in northern New Mexico and has a population of around 40,000. It is known for its cultural and historical landmarks, such as the Chimayó and Abiquiú historic districts and the Ghost Ranch.

Roosevelt County

Founded in 1903, Roosevelt County is located in eastern New Mexico and has a population of around 20,000. It is well-known for its agricultural industry and is home to the city of Portales.

San Juan County

San Juan County is located in northwestern New Mexico and has a population of around 128,000. It was established in 1887 and is much loved for its natural beauty, with attractions such as the Chaco Culture National Historical Park and the Bisti/De-Na-Zin Wilderness.

San Miguel County

Established in 1852, San Miguel County is located in northeastern New Mexico and has a population of around 27,000. It is known for its cultural and historical landmarks, such as the Las Vegas Plaza and the historic town of Pecos.

Sandoval County

Founded in 1903, Sandoval County is located in north-central New Mexico and has a population of around 150,000. It is celebrated for its natural beauty, with attractions such as the Jemez Mountains and the Valles Caldera National Preserve.

Santa Fe County

Established in 1852, Santa Fe County is situated in northern New Mexico and has around 150,000 residents. It is known for its cultural and historical landmarks, such as the Santa Fe Plaza and the Palace of the Governors.

Sierra County

Founded in 1884, Sierra County is located in southwestern New Mexico and is home to around 11,000 people. It is valued for its natural beauty, with attractions such as the Elephant Butte Lake State Park and the Geronimo Trail National Scenic Byway.

Socorro County

Established in 1850, Socorro County is located in south-central New Mexico and has a population of around 17,000. It is known for its historic landmarks, such as the San Miguel Mission and the Bosque del Apache National Wildlife Refuge.

Taos County

Taos County is located in northern New Mexico and has a population of around 33,000. It was established in 1852 and is famous for its cultural and natural landmarks, such as the Taos Pueblo and the Wheeler Peak Wilderness.

Torrance County

Founded in 1903, Torrance County is located in central New Mexico and has around 16,000 residents. It is acclaimed for its agriculture and ranching industry and is home to the town of Estancia.

Union County

Established in 1893, Union County is located in northeastern New Mexico and is home to around 4,000 people. It is known for its outdoor recreation opportunities, with attractions such as the Capulin Volcano National Monument and the Clayton Lake State Park.

Valencia County

Valencia County is situated in central New Mexico and has a population of around 76,000. It was established in 1852 and is known for its agricultural industry. It is home to the city of Belen.

Old Antique Atlases & Maps of New Mexico

David Rumsey Historical Map Collection

New Mexico Map Links

Caleb Pike
About the author

Caleb Pike is an avid hiker and nature lover, with a passion for exploring the great outdoors. He's a writer, photographer, and adventurer, always seeking new trails to blaze and peaks to conquer.