San Marcos Real EstateSan Marcos is located in California. San Marcos, California has a population of 93,493. San Marcos is more family-centric than the surrounding county with 42.7% of the households containing married families with children. The county average for households married with children is 34.63%. The median household income in San Marcos, California is $70,417. The median household income for the surrounding county is $70,588 compared to the national median of $57,652. The median age of people living in San Marcos is 35.1 years. San Marcos WeatherThe average high temperature in July is 83.8 degrees, with an average low temperature in January of 44.3 degrees. The average rainfall is approximately 13.5 inches per year, with 0 inches of snow per year. San Marcos MapReal estate near San MarcosNearby CitiesNearby Cities Homes for Sale |