San Marcos, California Population 2021

97,032
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San Marcos is a city located in San Diego County California. With a 2020 population of 97,032, it is the 80th largest city in California and the 336th largest city in the United States . San Marcos is currently growing at a rate of 0.19% annually and its population has increased by 15.82% since the most recent census, which recorded a population of 83,781 in 2010. San Marcos reached it's highest population of 97,032 in 2021. Spanning over 24 miles, San Marcos has a population density of 3,984 people per square mile.

The average household income in San Marcos is $105,999 with a poverty rate of 11.34%. The median rental costs in recent years comes to $1,704 per month, and the median house value is $538,200. The median age in San Marcos is 35.5 years, 34.8 years for males, and 36.2 years for females.

San Marcos Demographics

According to the most recent ACS, the racial composition of San Marcos was:

  • White: 74.31%
  • Asian: 9.74%
  • Two or more races: 6.01%
  • Other race: 5.99%
  • Black or African American: 2.72%
  • Native American: 0.77%
  • Native Hawaiian or Pacific Islander: 0.47%
The current population of San Marcos, California is 97,032 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 96,480.The last official US Census in 2010 recorded the population at 83,781.

San Marcos, California Population 2021

Population by Race

Race Population Percentage
White70,85874.31%
Asian9,2839.74%
Two or More Races5,7276.01%
Some Other Race5,7115.99%
Black or African American2,5912.72%
American Indian and Alaska Native7340.77%
Native Hawaiian and Other Pacific Islander4510.47%
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San Marcos Population by Race

San Marcos Population Pyramid $2021

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San Marcos Median Age

35.5


Total

34.8


Male

36.2


Female

San Marcos Adults

There are 70,336 adults, (12,271 of whom are seniors) in San Marcos.

San Marcos Age Dependency

64.2

Age Dependency Ratio

21.1

Old Age Dependency Ratio

43.1

Child Dependency Ratio

San Marcos Sex Ratio

Female

48,459

50.82%

Male

46,896

49.18%

San Marcos Population by Age

San Marcos Renter vs Owner Occupied by Household Type

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San Marcos Household Types

Type Owner Renter
Married71.9%28.1%
All62.3%37.7%
Non Family55.6%44.4%
Female45.6%54.4%
Male34.5%65.5%

62.3%

Rate of Home Ownership

San Marcos Households and Families

Type Count Average Size Owned
All29,7713.1762.3
Married16,6003.7371.9
Non Family7,7841.4955.6
Female3,6923.9545.6
Male1,6953.7434.5

3.61

Average Family Size

3.17

Average Household Size

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San Marcos Households by Type

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Education Attained Count Percentage
Less Than 9th Grade5,0068.29%
9th to 12th Grade3,8466.37%
High School Graduate11,60519.23%
Some College12,91821.40%
Associates Degree4,6207.66%
Bachelors Degree14,92524.73%
Graduate Degree7,43212.31%
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San Marcos Educational Attainment by Sex (over 25)

San Marcos Educational Attainment by Race

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Race Total High School Bachelors
White30,08328,99414,045
Hispanic20,24213,1542,994
Asian6,2965,7563,547
Other Race3,1742,121566
2+ Races2,4432,197787
Black1,6591,576901
Native American50840699
Islander391339211

The highest rate of high school graduation is among white people with a rate of 96.38%.

The highest rate of bachelors degrees is among asian people with a rate of 56.34%.

San Marcos Educational Attainment by Race

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Name Average Male Female
Overall$42,535$50,567$34,244
Less Than 9th Grade$25,620$28,338$20,841
High School Graduate$28,478$32,561$23,125
Some College$40,039$47,347$31,945
Bachelors Degree$66,419$83,800$49,705
Graduate Degree$95,858$121,186$75,044

$42,535

Average Earnings

$50,567

Average Male

$34,244

Average Female

San Marcos Earnings by Educational Attainment

San Marcos Language by Age

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San Marcos Language

63.15% of San Marcos residents speak only English, while 36.85% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 27.39% of the population.

San Marcos Language

San Marcos Poverty by Race

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Name Total In Poverty Poverty Rate
Hispanic37,6525,62414.94%
White41,1713,5638.65%
Asian9,18497410.61%
Multiple5,7145128.96%
Other5,5084738.59%
Black2,47624910.06%
Native73413518.39%
Islander4515913.08%

11.34%

Overall Poverty Rate

10.67%

Male Poverty Rate

11.99%

Female Poverty Rate

Poverty in San Marcos

The race most likely to be in poverty in San Marcos is Native, with 18.39% below the poverty level.

The race least likely to be in poverty in San Marcos is Other, with 8.59% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.61%. Among those working part-time, it was 16.12%, and for those that did not work, the poverty rate was 20.20%.

San Marcos Poverty

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Name Poverty
Less Than 9th Grade16.63%
High School13.86%
Some College9.96%
Bachelors or Greater4.20%

San Marcos Poverty Rate by Education

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Rate Poverty
Male Unemployed18.06%
Female Unemployed11.51%
Female Employed7.32%
Male Employed5.93%

San Marcos Poverty Rate by Employment Status and Sex

San Marcos Income by Household Type

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Name Median Mean
Households$78,797$105,999
Families$96,778$120,229
Married Families$117,281$138,276
Non Families$38,576$57,770
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Income by Household Type

San Marcos Marital Status

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Marriage Rates

50.9%

Overall Marriage Rate

53.1%

Male Marriage Rate

48.8%

Female Marriage Rate

San Marcos Married by Age and Sex

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San Marcos Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

San Marcos Marital Status by Race

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San Marcos Marital Status

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5,453

Number of Veterans

5,135

Male Veterans

318

Female Veterans

War Veterans
Vietnam1,696
First Gulf War1,559
Second Gulf War1,515
Korea387
World War II256

San Marcos Veterans by War

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Age Group Veterans
35 to 541,662
65 to 741,438
75+1,104
55 to 64631
18 to 34618

San Marcos Veterans by Age

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Name Veterans % of Total
White4,2608.08%
Hispanic1,1354.51%
Asian3254.46%
Black31116.02%
2+ Races2248.10%
Islander14732.59%
Other Race1172.78%
Native American6911.09%

San Marcos Veterans by Race

San Marcos Veterans by Education

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5.23%

Veteran Poverty Rate

25.25%

Veteran Disability Rate

San Marcos Veterans by Education

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66.3%

Labor Force Participation

63.2%

Employment Rate

3.9%

Unemployment Rate

San Marcos Employment by Age

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San Marcos Employment by Race

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San Marcos Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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53.03%

Born in San Marcos

76.04%

Native Born

23.96%

Foreign Born

11.99%

Non Citizen

11.97%

Naturalized

Place of Birth

76.04% of San Marcos residents were born in the United States, with 53.03% having been born in California. 11.99% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

San Marcos Place of Birth

Year Population Growth Annual Growth Rate
202197,0321840.19%
202096,8481840.19%
201996,6641840.19%
201896,4808660.91%
201795,6146820.72%
201694,9321,7331.86%
201593,1998270.90%
201492,3722,9493.30%
201389,4232,6073.00%
201286,8161,8152.14%
201185,0011,0751.28%
201083,92628,9494.32%
200054,97716,0033.50%
199038,97421,4958.35%
198017,47913,58316.20%
19703,8961,3964.54%
19602,5000.00%

San Marcos Population by Year