Marin County, California Population 2023

265,294

Marin County, California's estimated 2023 population is 265,294 with a growth rate of 0.37% in the past year according to the most recent United States census data. Marin County, California is the 26th largest county in California. The 2010 population was 252,409 and has seen a growth of 5.1% since that time.

Note: data after 2020 is projected based on recent growth

Marin County, California Population 2023

Population by Race

White

Other race

Two or more races

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Marin County, California Population by Race

Marin County, California Population Pyramid 2023

Marin County, California Median Age

47.1

Total

45.6

Male

48.4

Female

Marin County, California Adults

There are 207,467 adults, (57,834 of whom are seniors) in Marin County, California.

Marin County, California Age Dependency

73.4

Age Dependency Ratio

38.7

Old Age Dependency Ratio

34.7

Child Dependency Ratio

Marin County, California Sex Ratio

Female132,91251.23%
Male126,52948.77%

Marin County, California Population by Age

Marin County, California Renter vs Owner Occupied by Household Type

2.97

Average Family Size

2.41

Average Household Size

63.6%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Marin County, California Households and Families

Male

Female

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Marin County, California Educational Attainment by Sex (over 25)

Marin County, California Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

The highest rate of high school graduation is among white people with a rate of 87.96%.

The highest rate of bachelors degrees is among white people with a rate of 59.85%.

Marin County, California Educational Attainment by Race

All

Male

Female

$67,212

Average Earnings

$81,615

Average Male

$54,704

Average Female

Marin County, California Earnings by Educational Attainment

Marin County, California Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Marin County, California Language

78.94% of Marin County, California residents speak only English, while 21.06% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 11.47% of the population.

Marin County, California Language

Marin County, California Poverty by Race

rate

8.06%

Overall Poverty Rate

6.44%

Male Poverty Rate

7.33%

Female Poverty Rate

Poverty in Marin County, California

The race most likely to be in poverty in Marin County, California is Other, with 29.06% below the poverty level.

The race least likely to be in poverty in Marin County, California is Islander, with 2.92% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.57%. Among those working part-time, it was 7.63%, and for those that did not work, the poverty rate was 12.6%.

Marin County, California Poverty

Marin County, California Poverty Rate by Education

Marin County, California Poverty Rate by Employment Status and Sex

Marin County, California Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

mean

median

Income by Household Type

Marin County, California Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

52.4%

Overall Marriage Rate

56.1%

Male Marriage Rate

48.8%

Female Marriage Rate

Marin County, California Married by Age and Sex

male

female

Marin County, California Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

Marin County, California Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Marin County, California Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

9,370

Number of Veterans

8,843

Male Veterans

527

Female Veterans

Marin County, California Veterans by War

Marin County, California Veterans by Age

count

Marin County, California Veterans by Race

Marin County, California Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

2.94%

Veteran Poverty Rate

26.89%

Veteran Disability Rate

Marin County, California Veterans by Education

LaborForceParticipation

63.8%

Labor Force Participation

60.8%

Employment Rate

4.5%

Unemployment Rate

Marin County, California Employment by Age

LaborForceParticipation

Marin County, California Employment by Race

LaborForceParticipation

Marin County, California Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

50.03%

Born in Marin County, California

80.84%

Native Born

18.06%

Foreign Born

9.2%

Non Citizen

8.86%

Naturalized

Place of Birth

80.84% of Marin County, California residents were born in the United States, with 50.03% having been born in California. 9.2% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Marin County, California Place of Birth

Sources