Where is San Marcos, California, U.S.

Written and Fact-checked by | Updated On: March 05, 2026, 14:55 ET

Where is San Marcos, California Located in the United States? - San Marcos is a city located in the San Diego County in California, United States. San Marcos lies between 33.1434 Degrees North latitudes and -117.1661 Degrees West longitudes.

Location Map of San Marcos, San Diego, California

Where is San Marcos Located in San Diego, California

About Map: The map shows the location of San Marcos in San Diego County, in the U.S. state of California.

San Marcos Map, California, USA

About San Marcos Map: This Google Map provides a detailed view with zoom, satellite, and street options to explore the area and its surroundings.

About San Marcos, San Diego County, California

San Marcos is located in San Diego County in the U.S. state of California, United States. It lies in the southern part of the state in the state of the United States within the North County region of the San Diego metropolitan area. The city was incorporated in 1963 and was named after Rancho San Marcos, and it has developed into a residential, educational, and commercial center in northern San Diego County.

Population

According to the United States Census Bureau, the population of San Marcos is 94,833 as recorded in the 2020 Census, and the population density is approximately 3,900 people per square mile.

Area and Geography

According to the United States Census Bureau, San Marcos covers a total area of approximately 24.4 square miles (about 63.2 square kilometers), including about 24.4 square miles (63.2 square kilometers) of land and a minimal amount of water area.

Location and Surroundings

San Marcos is situated east of Carlsbad and south of Escondido, positioned a few miles inland from the Pacific coastline. The city features rolling hills, residential neighborhoods, and commercial districts that reflect its suburban growth. State Route 78 serves as the primary transportation corridor, connecting San Marcos to surrounding communities and coastal areas.

Attractions and Recreation

San Marcos offers parks, hiking trails, and recreational facilities that support outdoor activities and community events. Popular destinations include Double Peak Park, Discovery Lake, and Lake San Marcos. The city is also home to California State University San Marcos and Palomar College, contributing significantly to higher education and regional economic development.

Transportation

San Marcos is served by State Route 78, providing direct highway access across northern San Diego County. Public transportation includes the SPRINTER light rail line and regional bus services linking the city to Oceanside and Escondido. The nearest major airport is San Diego International Airport, located approximately 35 miles to the south.

Explore more cities in California or visit the United States Map section to learn more about the country’s geography.

Sources:

Population and area data sourced from the United States Census Bureau (2020 Census). General city information referenced from the Official San Marcos City Website.

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  • San Marcos City Facts

    CitySan Marcos
    StateCalifornia
    CountySan Diego County
    CountryUnited States
    RegionSouthern California - North County San Diego
    IncorporatedJanuary 28, 1963
    Founded1880s
    Total AreaApproximately 24.4 sq mi (63.2 km2)
    Land AreaApproximately 24.4 sq mi (63.2 km2)
    Water AreaApproximately 0.0 sq mi (0.0 km2)
    ElevationApproximately 620 ft (189 m)
    Population (2023 estimate)Approximately 95,000+
    Population (2020 Census)94,833
    Population DensityApproximately 3,900 people per sq mi
    Time ZonePacific Time (UTC-8 / UTC-7 DST)
    ZIP Codes92024, 92069, 92078, 92079, 92096
    Area Code760, 442
    Major HighwaysState Route 78, Interstate 15 nearby
    Public TransitNorth County Transit District - Sprinter, Breeze Bus
    Major AttractionsCalifornia State University San Marcos, Double Peak Park, Discovery Lake
    Official Websitehttps://www.san-marcos.net/

    Distance from San Marcos City, CA to Nearby Cities in California

    • Vista, CA – 6 miles (10 km)
    • Escondido, CA – 10 miles (16 km)
    • Carlsbad, CA – 12 miles (19 km)
    • Oceanside, CA – 14 miles (23 km)
    • Encinitas, CA – 15 miles (24 km)
    • Poway, CA – 20 miles (32 km)
    • Del Mar, CA – 22 miles (35 km)
    • La Jolla, CA – 30 miles (48 km)
    • San Diego, CA – 35 miles (56 km)
    • Chula Vista, CA – 45 miles (72 km)
    • Temecula, CA – 30 miles (48 km)
    • Murrieta, CA – 35 miles (56 km)
    • Lake Elsinore, CA – 40 miles (64 km)
    • Riverside, CA – 60 miles (97 km)
    • Corona, CA – 55 miles (89 km)
    • San Clemente, CA – 25 miles (40 km)
    • Irvine, CA – 50 miles (80 km)
    • Anaheim, CA – 60 miles (97 km)
    • Santa Ana, CA – 55 miles (89 km)
    • Los Angeles, CA – 90 miles (145 km)

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