Montgomery County, MD Population

The population of Montgomery County is 1.06 million, according to the U.S. Census Bureau ACS estimates.
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Updated Jun 23, 2023
Overview
1.06 million
Total Population
39.6
Median age
51.35%
Female population %
94.7:100
Gender ratio (M:F)
35-39 years
Largest age group
53.5
Total dependency ratio
White
Largest racial group
208,216
Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

Age

Montgomery County's population is old compared to the rest of the country:

  • The median age in Montgomery County is 39.6, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
  • Montgomery County's population under 18 was 23.30%, compared to the 22.51% nationwide.
  • Montgomery County's elderly or the senior population (over 65 age) was 15.62% as compared to 16.04% nationwide.
  • Of the total population in Montgomery County, 19.24% were under the age of 15, 17.65% aged 15 to 29, 47.49% aged 30 to 64, 13.55% aged 65 to 84, and 2.06% were 85 years of age and older.
The graph shows Montgomery County's population by age group, with age group on x-axis and the respective age group's percent of the total population on y-axis
Montgomery County, MD population by age group. The largest age group was 35-39 years with a poulation of 75,318 (7.12% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Read more about Montgomery County, MD population by age ➔

Gender

There are 28,617 more females than males in Montgomery County:

  • The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 51.35% females and 48.65% males in Montgomery County, MD.
  • The Montgomery County, MD gender ratio is 94.7:100 i.e. 94.7 men to 100 women (0.947).
  • For male population, the largest age group is 10-14 years with a population of 37,779.
  • For the female population, the largest age group is 35-39 years with a population of 39,221.
The grouped bar chart shows Montgomery County, MD population by age and gender across 18 age groups, defined between the age of 0 and 85 and above. The female population is shown in pink color bar and male population is shown in blue color bar. Age group is plotted on x axis and population on y axis.
California population by gender and age. Largest age group (population): Male # 10-14 years (37,779) | Female # 35-39 years (39,221). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Read more about Montgomery County, MD population by gender ➔

Race / Ethnicity

Montgomery County's population has become increasingly diverse:

  • Racial distribution of Montgomery County population: 48.85% are White, 18.40% are Black or African American, 0.36% are American Indian and Alaska Native, 15.19% are Asian, 0.03% are Native Hawaiian and other Pacific Islander, 9.90% are some other race and 7.27% are multiracial.
  • Montgomery County's racial breakdown clearly shows that there is no majority of any race in the county.
  • By ethnicity, 208,216 is Hispanic or Latino (of any race), and 848,985 (80.30% of the total population) is Non-Hispanic.
  • The largest racial group in Montgomery County is White with a population of 516,438 (48.85% of the total population).
The bar chart shows Montgomery County, MD population by race, in percentage. The numbers shown are based on the American Community Survey respondents self identified race. The Hispanic and Latino population is spread across the races identified and not as a separate race category.
Montgomery County, MD population by race. The largest racial group in Montgomery County is White with a population of 516,438 (48.85% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Read more about Montgomery County, MD population by race ➔

Year by year

Montgomery County's population has already reached its peak and is showing a trend of decline:

  • The peak population was 1,060,825 in the year 2020
  • From 2000 to 2010, Montgomery County's population increased by 97,789 (11.14%), as compared to the national growth of 9.63%.
  • From 2010 to 2020, Montgomery County's population increased by 85,206 (8.73%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
  • Between the year 2000 and 2022, Montgomery County's population was lowest in year 2000 at 877,830.
The graph shows Montgomery County's population from 2000 to 2022, with years on x-axis and population on y-axis
Montgomery County's population from 2000 to 2022. The estimated population at the end of 2022 was 1,052,521. Source: U.S. Census Bureau (Population Estimates Program)

Read more about Montgomery County, MD population by year ➔

References

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Montgomery County, MD Demographics

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