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Call/text (707) 474-8855Lake San Marcos, CA · Census-designated place
Lake San Marcos, California houses and real estate market data.
Houses in Lake San Marcos, CA (San Diego County) — market data for Lake San Marcos houses and the whole local market.
Census-designated place · Census GEOID 0639724
🔥 FEATURED LISTING: WATERFRONT LAKE HOME FOR SALE
Clearlake Oaks Canal-Front Oasis
$374,999 • 3 Beds • 2 Baths • 1,204 Sq Ft
554 Keys, Clearlake Oaks, CA 95423
Luxury Living Lake Lifestyle – Deep Water Access to Clear Lake: PAID-OFF SOLAR • 10-Ft Concrete Seawall • Double Boat Lifts & Private Dock • Hot Tub • Mini-Split HVAC • Close to SF Bay / Wine Country • Cleanest Air in America (Lake County CA) • Spacious Patio and Deck • Open Floor Plan • RV/Boat Parking • Want the Boats? • Make Offer ASAP This Lake Home For Sale in California won't last!
*Listed by Scott Brown, EXP Realty, DRE #01956840. Inquiries delivered directly to listing agent. Search.USAHouses.com*
📩 Contact Agent Direct:
Scott Brown - EXP Realty
Scott@USAHouses.com
Call/Text (707) 474-8855
👉 Click Anywhere on Ad for More Info / Listing Page
Lake San Marcos, CA is a Census-designated place in San Diego County, California — this guide covers houses in Lake San Marcos and the whole local market: resale homes, condos, land, and new construction.
Info from government sites and builders may have provided source info.
Open map pin ↗ · 33.122362, -117.208576
At a glance
Lake San Marcos market snapshot
Place type
Census-designated place
County
San Diego County
Map pin
33.122362, -117.208576
Census GEOID
0639724
Land area
1.71 sq mi
Market data compiled from public sources; deemed reliable but not guaranteed; verify independently. See About
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What makes Lake San Marcos different
Census-designated place
The U.S. Census Bureau lists Lake San Marcos as a Census-designated place in San Diego County, California — a settled community that is not an incorporated city, town, or village. This page uses the same /california/lake-san-marcos/ guide pattern as incorporated places.
Nearby
Places around Lake San Marcos
County guide: San Diego County — cities, market context, and local resources for the county that includes Lake San Marcos.
USAHouses.com also publishes Census place pages for other communities in the same county as Lake San Marcos.
Nearby communities include San Marcos, Elfin Forest, Harmony Grove, Carlsbad, Vista, Encinitas, Del Dios, Rancho Santa Fe, Escondido, Hidden Meadows, Oceanside, Fairbanks Ranch, Solana Beach, Bonsall, Del Mar, Camp Pendleton South.
San Marcos market data
Nearby city · ~2.4 mi
Elfin Forest market data
Nearby city · ~3.4 mi
Harmony Grove market data
Nearby city · ~4.3 mi
Carlsbad market data
Nearby city · ~4.4 mi
Vista market data
Nearby city · ~5.0 mi
Encinitas market data
Nearby city · ~5.9 mi
Del Dios market data
Nearby city · ~6.1 mi
Rancho Santa Fe market data
Nearby city · ~6.7 mi
Escondido market data
Nearby city · ~7.8 mi
Hidden Meadows market data
Nearby city · ~8.7 mi
Oceanside market data
Nearby city · ~9.1 mi
Fairbanks Ranch market data
Nearby city · ~9.1 mi
Solana Beach market data
Nearby city · ~9.5 mi
Bonsall market data
Nearby city · ~10.6 mi
Del Mar market data
Nearby city · ~11.3 mi
Camp Pendleton South market data
Nearby city · ~13.0 mi
Adjacent-county Census places with USAHouses.com pages: Temecula (~26.0 mi), Aguanga (~30.6 mi), Murrieta (~31.2 mi), San Clemente (~32.5 mi), French Valley (~33.5 mi), Rancho Mission Viejo (~33.9 mi), Wildomar (~34.3 mi), Lake Riverside (~35.7 mi), San Juan Capistrano (~36.7 mi), Sage (~36.9 mi), Dana Point (~37.1 mi), Lakeland Village (~37.5 mi), Ladera Ranch (~38.7 mi), Canyon Lake (~39.2 mi), Menifee (~39.2 mi), Coto de Caza (~39.4 mi).
Census & home facts
Lake San Marcos data from published sources
County FHFA annual change (2025)
0.66%
County median listing price (FRED/Realtor.com) (2026-06-01)
$929,000
Census place type
CDP
County
San Diego County
Land area (Census Gazetteer 2024)
1.71 sq mi
Census GEOID
0639724
Census ACS, FHFA, and FRED figures are labeled with the year present in existing CSVs. Subject to change / confirm locally.
NewUSAHouses.com communities
Closest verified new-home communities near Lake San Marcos
Availability and pricing are controlled by the builder and may change; confirm with the builder.
The Row ↗
Lennar · San Marcos, California · ~1.5 mi · from $529,900
Amplitude ↗
Shea Homes · San Marcos, California · ~2.2 mi · from $795,750
Cole Associates ↗
Champion Homes · San Marcos, California · ~2.2 mi
Paloma ↗
California Pacific Homes · San Marcos, California · ~2.2 mi
Cielo ↗
Meritage Homes · San Marcos, California · ~2.2 mi · from $673,000
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Common questions
Lake San Marcos FAQ
What kind of place is Lake San Marcos, CA?
The U.S. Census Bureau lists Lake San Marcos as a Census-designated place in San Diego County, California — a settled community that is not an incorporated city, town, or village.
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