Census-designated place · Maryland
Monrovia, Maryland
Monrovia, census-designated place, in Frederick County, Maryland. Monrovia had 2,702 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 3,568 (±696). GEOID 2453100.
Residents, 2020 Census
2,702
Census count or controlled total
ACS 2020-2024 estimate: 3,568 ±696
Median household income
$207,153
±$58,385 (90% margin)
Maryland: $103,678
Median home value
$805,100
±$41,582 (90% margin)
Maryland: $419,900
Median gross rent
not published
Maryland: $1,705
Where is Monrovia and what county is it in?
Monrovia is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Frederick County, Maryland. It covers 2.2 square miles of land, 1,204 residents per square mile in 2020.
Monrovia is in the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan statistical area, which takes in 23 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Monrovia, and is it growing?
The 2020 Census counted 2,702 residents in Monrovia, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 3,568 (±696).
The Census Bureau publishes yearly population estimates for incorporated places only; Monrovia is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Monrovia | Frederick County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,568 ±696 | 287,048 | +2,665 |
| Households | 1,041 ±160 | 104,635 | +756 |
| Average household size | 3.43 ±0.39 | 2.70 | no clear change |
| Housing units | 1,041 ±160 | 108,924 | +711 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Monrovia?
The median resident of Monrovia is 38.1 years old. The largest group is non-Hispanic white residents at 43.9%, then non-Hispanic Asian residents at 29.8%. 28.6% of residents were born outside the United States.
| Measure | Monrovia | Frederick County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.1 ±2.5 | 39.0 | no clear change |
| Under 18 years | 29.3% ±5.4 pts | 23.3% | – |
| 65 years and over | 6.9% ±4.9 pts | 15.3% | – |
| Male | 50.2% ±4.1 pts | 49.5% | – |
| Hispanic or Latino (any race) | 4.2% ±3.0 pts | 12.9% | – |
| White alone, not Hispanic | 43.9% ±9.8 pts | 65.7% | −27.1 pts |
| Black or African American alone, not Hispanic | 17.5% ±8.3 pts | 10.1% | – |
| Asian alone, not Hispanic | 29.8% ±9.0 pts | 5.9% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.2 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.2 pts | 0.0% | – |
| Two or more races, not Hispanic | 4.5% ±5.1 pts | 5.0% | – |
| Some other race alone, not Hispanic | 0.0% ±1.2 pts | 0.3% | – |
| Born outside the United States | 28.6% ±8.2 pts | 13.8% | – |
| Speak a language other than English at home (age 5+) | 27.7% ±8.8 pts | 17.7% | – |
| Civilian veterans (age 18+) | 15.5% ±6.8 pts | 7.5% | – |
| With a disability | 3.8% ±2.3 pts | 9.9% | – |
| No health insurance coverage | 0.2% ±0.4 pts | 4.7% | – |
| High school graduate or higher (age 25+) | 98.2% ±2.0 pts | 93.4% | – |
| Bachelor's degree or higher (age 25+) | 72.3% ±8.4 pts | 45.8% | no clear change |
| Graduate or professional degree (age 25+) | 28.8% ±8.0 pts | 20.5% | – |
| Lived in the same house a year earlier | 93.0% ±4.3 pts | 89.4% | – |
| Moved from another state in the past year | 2.1% ±2.1 pts | 2.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Monrovia earn?
Half of Monrovia's 1,041 households earn less than $207,153 a year (±$58,385), against $122,002 in Frederick County and $103,678 in Maryland. In 2015-2019 it was $182,857 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Monrovia | Frederick County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $207,153 ±$58,385 | $122,002 | no clear change |
| Mean household income | $233,239 ±$30,807 | $148,300 | – |
| Per capita income | $68,424 ±$8,436 | $54,982 | no clear change |
| People below the poverty line | 0.0% ±1.2 pts | 6.0% | – |
| Children under 18 below the poverty line | 0.0% ±4.0 pts | 6.8% | – |
| Households receiving SNAP | 0.1% ±1.0 pts | 7.4% | – |
| Households with a computer | 98.1% ±3.0 pts | 96.8% | – |
| Households with a broadband subscription | 98.1% ±3.0 pts | 93.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Monrovia?
Owners occupy 98.3% of Monrovia's occupied homes and renters 1.7%. The median owner-occupied home is valued at $805,100 by its owner (±$41,582).
| Measure | Monrovia | Frederick County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $805,100 ±$41,582 | $464,600 | +$141,756 |
| Renters paying 35% or more of income on rent | 0.0% ±79.9 pts | 39.7% | – |
| Median monthly owner costs, with a mortgage | $3,300 ±$503 | $2,449 | – |
| Owner-occupied homes | 98.3% ±3.0 pts | 77.0% | no clear change |
| Renter-occupied homes | 1.7% ±3.0 pts | 23.0% | – |
| Housing units | 1,041 ±160 | 108,924 | +711 |
| Homeowner vacancy rate | 0.0% ±4.1 pts | 0.4% | – |
| Rental vacancy rate | 0.0% ±79.9 pts | 3.2% | – |
| Single-family detached homes | 92.4% ±5.5 pts | 60.1% | – |
| Mobile homes | 0.0% ±4.0 pts | 0.6% | – |
| Built 2020 or later | 17.7% ±8.5 pts | 4.1% | – |
| Built 2010 to 2019 | 63.6% ±11.2 pts | 12.3% | – |
| Built 1939 or earlier | 0.0% ±4.0 pts | 10.8% | – |
| Households with no vehicle | 2.3% ±3.0 pts | 4.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Monrovia work and get to work?
64.7% of Monrovia's workers drive alone and 30.2% work from home. The average trip to work takes 37.3 minutes.
| Measure | Monrovia | Frederick County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 80.6% ±7.3 pts | 69.9% | – |
| Unemployment rate | 2.2% ±2.7 pts | 3.3% | – |
| Drove alone to work | 64.7% ±10.5 pts | 67.5% | – |
| Carpooled | 5.1% ±4.6 pts | 7.2% | – |
| Public transportation | 0.0% ±2.0 pts | 1.1% | – |
| Walked | 0.0% ±2.0 pts | 1.8% | – |
| Worked from home | 30.2% ±9.4 pts | 21.2% | – |
| Mean travel time to work | 37.3 min ±5.6 | 33.1 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Monrovia?
No census tract lies mostly in Monrovia; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 7521.02Frederick County | 8,071 | $179,609 |
| Tract 7519.03Frederick County | 7,473 | $178,797 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Monrovia) · Census block assignment files
How does Monrovia compare with other places in Maryland?
Monrovia ranks 16th of 322 places in Maryland with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 237th | 326 |
| Residents per square mile | 250th | 326 |
| Median household income | 16th | 322 |
| Per capita income | 54th | 326 |
| Median home value | 20th | 323 |
| Bachelor's degree or higher | 20th | 325 |
| Median age | 207th | 326 |
| Owner-occupied share | 4th | 323 |
| Work from home | 34th | 293 |
| Travel time to work | 51st | 325 |
Monrovia's figures with every place in Maryland (CSV)
Every place in Maryland, sortable · Compare Monrovia with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Monrovia?
22 of the 56 figures for Monrovia on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Monrovia are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.