Mount Rainier, Maryland demographics

Mount Rainier, MD demographics: median age 40.1; 37.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Mount Rainier city, Maryland · Incorporated city · GEOID 2454275. The survey estimates a population of 8,245 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Mount Rainier is 40.1 years, with a 90% margin of error of 3.6 years. There are 3,934 households (±409). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	40.1 ±3.6	39.4 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 8,245
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Under 18	1,917 ±400	23.3% ±4.9 pp	22.2%	22.0%
18–34	1,476 ±317	17.9% ±3.8 pp	21.7%	22.8%
35–64	3,571 ±544	43.3% ±6.6 pp	39.5%	38.0%
65 and older	1,281 ±339	15.5% ±4.1 pp	16.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 8,245
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Male	3,924 ±416	47.6% ±5.0 pp	48.7%	49.5%
Female	4,321 ±416	52.4% ±5.0 pp	51.3%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 8,245
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
White alone	1,670 ±473	20.3% ±5.7 pp	48.2%	61.0%
Black or African American alone	3,560 ±687	43.2% ±8.3 pp	29.4%	12.2%
American Indian and Alaska Native alone	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.4%	0.9%
Asian alone	99 ±53 · low precision	1.2% ±0.6 pp · low precision	6.6%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.0%	0.2%
Some other race alone	1,923 ±522	23.3% ±6.3 pp	6.9%	7.1%
Two or more races	993 ±428	12.0% ±5.2 pp	8.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 8,245
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Not Hispanic or Latino	5,384 ±605	65.3% ±7.3 pp	87.5%	80.7%
Hispanic or Latino	2,861 ±599	34.7% ±7.3 pp	12.5%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 3,934
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Married-couple family	1,240 ±249	31.5% ±5.4 pp	46.2%	46.9%
Other family: male householder, no spouse present	132 ±101 · low precision	3.4% ±2.5 pp · low precision	5.1%	5.1%
Other family: female householder, no spouse present	414 ±132	10.5% ±3.2 pp	13.7%	12.2%
Nonfamily: householder living alone	2,074 ±434	52.7% ±9.6 pp	28.7%	28.7%
Nonfamily: householder not living alone	74 ±44 · low precision	1.9% ±1.1 pp · low precision	6.4%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 3,934
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Households with people under 18	923 ±167	23.5% ±3.5 pp	30.6%	29.5%
Households without people under 18	3,011 ±474	76.5% ±9.0 pp	69.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 3,934
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
One-person nonfamily households	2,074 ±434	52.7% ±9.6 pp	28.7%	28.7%
Two-person households	829 ±245	21.1% ±5.8 pp	32.1%	33.8%
Three-person households	317 ±128	8.1% ±3.2 pp	16.0%	15.3%
Four-person households	393 ±159	10.0% ±3.9 pp	13.3%	12.6%
Five-person households	146 ±84 · low precision	3.7% ±2.1 pp · low precision	6.0%	5.9%
Six-person households	63 ±57 · low precision	1.6% ±1.4 pp · low precision	2.4%	2.2%
Seven or more people	112 ±89 · low precision	2.8% ±2.2 pp · low precision	1.5%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 8,245
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Native	5,806 ±389	70.4% ±4.7 pp	83.4%	85.9%
Foreign born	2,439 ±385	29.6% ±4.7 pp	16.6%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 7,745
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
English only	4,713 ±591	60.9% ±7.5 pp	78.9%	77.7%
Spanish	2,597 ±568	33.5% ±7.3 pp	9.6%	13.6%
French, Haitian, or Cajun	92 ±88 · low precision	1.2% ±1.1 pp · low precision	1.3%	0.7%
German or other West Germanic	27 ±29 · low precision	0.3% ±0.4 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	10 ±16 · low precision	0.1% ±0.2 pp · low precision	0.6%	0.7%
Other Indo-European	60 ±51 · low precision	0.8% ±0.7 pp · low precision	2.5%	2.0%
Korean	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.6%	0.3%
Chinese, including Mandarin and Cantonese	47 ±47 · low precision	0.6% ±0.6 pp · low precision	1.2%	1.1%
Vietnamese	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.3%	0.5%
Tagalog, including Filipino	24 ±31 · low precision	0.3% ±0.4 pp · low precision	0.6%	0.6%
Other Asian and Pacific Island	8 ±13 · low precision	0.1% ±0.2 pp · low precision	1.1%	1.1%
Arabic	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.4%	0.5%
Other and unspecified	167 ±94 · low precision	2.2% ±1.2 pp · low precision	2.5%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 5,925
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Less than high school graduate	952 ±253	16.1% ±4.1 pp	8.9%	10.4%
High school graduate or equivalency	1,473 ±378	24.9% ±6.1 pp	23.4%	26.0%
Some college, no degree	1,084 ±307	18.3% ±5.0 pp	17.4%	19.1%
Associate’s degree	172 ±82	2.9% ±1.4 pp	6.8%	8.8%
Bachelor’s degree	1,220 ±282	20.6% ±4.5 pp	22.7%	21.6%
Graduate or professional degree	1,024 ±311	17.3% ±5.1 pp	20.8%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 8,171
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Same house	7,474 ±321	91.5% ±3.8 pp	88.7%	87.7%
Moved within same county	542 ±315 · low precision	6.6% ±3.9 pp · low precision	5.2%	6.3%
Moved from a different county in the same state	54 ±75 · low precision	0.7% ±0.9 pp · low precision	2.8%	3.1%
Moved from a different state	76 ±71 · low precision	0.9% ±0.9 pp · low precision	2.6%	2.3%
Moved from abroad	25 ±29 · low precision	0.3% ±0.4 pp · low precision	0.7%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

19.6% of Mount Rainier residents (±5.6 percentage points) had no health insurance coverage when surveyed, compared with 6.3% in Maryland and 8.4% nationally. 94.0% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Mount Rainier	Maryland	U.S.	Compared with Maryland
People without health insurance Civilian noninstitutionalized population	19.6% ±5.6 pp	6.3%	8.4%	Higher
Households with a broadband subscription Households	94.0% ±13.6 pp	92.4%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	5.8% ±2.7 pp	6.8%	6.2%	Not statistically different

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Mount Rainier . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Mount Rainier housing and cost context or return to the city profile.