21791 ZIP Code
Union Bridge, Maryland
December 16, 2025
| ZIP Code: | 21791 |
| City/Town: | Union Bridge |
| County: | Carroll |
| State: | Maryland |
| ZIP Type: | Standard |
| Population: | 4,855 |
| Median Household Income: | $88,984 |
| Per Capita Income: | $50,750 |
| Total Housing Units: | 1,989 |
| Median Home Value: | $349,900 |
| Land Area: | 46.0 sq miles
119.2 sq km |
| Water Area: | 0.1 sq miles
0.2 sq km |
| Coordinates: | 39.5331, -77.1886 |
Population Information (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Total Population: | 4,855 | -- | -- |
| Male: | 2,632 | 54.2% | 49.6% |
| Female: | 2,223 | 45.8% | 50.4% |
| Median Age: | 42.6 yrs | -- | 38.5 yrs |
| Under 5 years: | 286 | 5.9% | 5.7% |
| 5 to 9 years: | 150 | 3.1% | 6.0% |
| 10 to 14 years: | 275 | 5.7% | 6.5% |
| 15 to 19 years: | 393 | 8.1% | 6.6% |
| 20 to 24 years: | 281 | 5.8% | 6.7% |
| 25 to 34 years: | 602 | 12.4% | 13.7% |
| 35 to 44 years: | 604 | 12.4% | 12.9% |
| 45 to 54 years: | 554 | 11.4% | 12.4% |
| 55 to 59 years: | 392 | 8.1% | 6.5% |
| 60 to 64 years: | 406 | 8.4% | 6.4% |
| 65 to 74 years: | 466 | 9.6% | 9.7% |
| 75 to 84 years: | 244 | 5.0% | 4.8% |
| 85 years and over: | 202 | 4.2% | 2.0% |
Housing Information (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Median home value: | $349,900 | -- | $281,900 |
| Median rooms: | 6.9 | -- | 5.5 |
| Median rent: | $1,156 / mo. | -- | $1,268 / mo. |
| Total housing units: | 1,989 | -- | -- |
| Occupied housing units: | 1,879 | 94.5% | 38.0% |
| Vacant housing units: | 110 | 5.5% | 4.6% |
| Housing tenure: | -- | -- | -- |
| Owner-occupied: | 1,530 | 81.4% | 64.8% |
| Renter-occupied: | 349 | 18.6% | 35.2% |
Educational Attainment (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Population 25 years and over: | 3,470 | -- | -- |
| Less than 9th grade: | 122 | 3.5% | 4.7% |
| 9th to 12th grade, no diploma: | 126 | 3.6% | 6.1% |
| High school graduate: | 1,532 | 44.1% | 26.4% |
| Some college, no degree: | 689 | 19.9% | 19.7% |
| Associate degree: | 103 | 3.0% | 8.7% |
| Bachelor's degree: | 523 | 15.1% | 20.9% |
| Graduate or professional degree: | 375 | 10.8% | 13.7% |
| Percent high school graduate or higher: | -- | 92.9% | 89.1% |
| Percent bachelor's degree or higher: | -- | 25.9% | 34.3% |
Income Information (21791 zip code)
| Value | US AvgUS | |
|---|---|---|
| Median household income: | $88,984 / yr. | $75,149 / yr. |
| Mean household income: | $109,807 / yr. | $105,833 / yr. |
| Median family income: | $107,813 / yr. | $92,646 / yr. |
| Per capita income: | $50,750 / yr. | $41,261 / yr. |
Employment (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| In labor force: | 2,577 | -- | 63.5% |
| Employed: | 2,503 | 97.4% | 96.4% |
| Unemployed: | 66 | 2.6% | 5.3% |
| Not in labor force: | 1,515 | -- | -- |
| Class of Worker: | -- | -- | -- |
| Private wage and salary: | 1,705 | 68.1% | 79.7% |
| Government workers: | 514 | 20.5% | 14.2% |
| Self-employed: | 229 | 9.1% | 5.9% |
| Unpaid family workers: | 55 | 2.2% | 0.1% |
Race & Ethnicity (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Race (one race): | -- | -- | -- |
| White: | 4,617 | 95.1% | 61.6% |
| Black or African American: | 53 | 1.1% | 12.4% |
| American Indian/Alaska Native: | 5 | 0.1% | 1.1% |
| Asian: | 81 | 1.7% | 6.0% |
| Native Hawaiian/Pacific Islander: | 10 | 0.2% | 0.2% |
| Some other race: | 26 | 0.5% | 8.4% |
| Two or more races: | 63 | 1.3% | 10.2% |
| Hispanic or Latino (any race): | 30 | 0.6% | 18.7% |
| Mexican: | 45 | 0.9% | 11.2% |
| Puerto Rican: | 3 | 0.1% | 1.8% |
| Cuban: | 0 | 0.0% | 0.7% |
| Other Hispanic or Latino: | 0 | 0.0% | 5.0% |
| Not Hispanic or Latino: | 42 | 0.9% | 81.1% |
Income Distribution (21791 zip code)
| Household Income | Households | Percent% | US AvgUS |
|---|---|---|---|
| Less than $10,000: | 27 | 1.4% | 4.9% |
| $10,000 to $14,999: | 64 | 3.4% | 3.8% |
| $15,000 to $24,999: | 85 | 4.5% | 7.0% |
| $25,000 to $34,999: | 98 | 5.2% | 7.4% |
| $35,000 to $49,999: | 148 | 7.9% | 10.7% |
| $50,000 to $74,999: | 372 | 19.8% | 16.1% |
| $75,000 to $99,999: | 213 | 11.3% | 12.8% |
| $100,000 to $149,999: | 411 | 21.9% | 17.1% |
| $150,000 to $199,999: | 271 | 14.4% | 8.8% |
| $200,000 or more: | 190 | 10.1% | 11.4% |
Commute to Work (21791 zip code)
| Commute Method | Workers | Percent% | US AvgUS |
|---|---|---|---|
| Drove alone: | 2,097 | 83.8% | 67.8% |
| Carpooled: | 103 | 4.1% | 8.7% |
| Public transportation: | 1 | 0.0% | 4.2% |
| Walked: | 35 | 1.4% | 2.5% |
| Other means: | 4 | 0.2% | 0.9% |
| Worked from home: | 189 | 7.6% | 13.8% |
| Mean travel time to work: | 37.2 min | -- | 26.7 min |
Industry (21791 zip code)
| Industry Sector | Workers | Percent% | US AvgUS |
|---|---|---|---|
| Agriculture, forestry, fishing, mining: | 146 | 5.8% | 1.6% |
| Construction: | 339 | 13.5% | 6.9% |
| Manufacturing: | 175 | 7.0% | 10.0% |
| Wholesale trade: | 28 | 1.1% | 2.4% |
| Retail trade: | 238 | 9.5% | 11.0% |
| Transportation, warehousing, utilities: | 162 | 6.5% | 5.8% |
| Information: | 50 | 2.0% | 1.9% |
| Finance, insurance, real estate: | 97 | 3.9% | 6.7% |
| Professional, scientific, management: | 389 | 15.5% | 12.1% |
| Education, health care, social services: | 265 | 10.6% | 23.3% |
| Arts, entertainment, food services: | 184 | 7.4% | 9.0% |
| Other services: | 179 | 7.2% | 4.7% |
| Public administration: | 251 | 10.0% | 4.7% |
Poverty Status (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Poverty Rate: | -- | 9.8% | 8.8% |
| All people below poverty level: | -- | -- | -- |
| Under 18 years: | -- | -- | 16.3% |
| 18 to 64 years: | -- | -- | 11.0% |
| 65 years and over: | -- | -- | 10.3% |
Health Insurance (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| With health insurance: | 4,533 | 93.4% | 91.3% |
| Private health insurance: | 3,647 | 75.1% | 67.6% |
| Public health coverage: | 1,735 | 35.7% | 35.9% |
| Without health insurance: | 314 | 6.5% | 8.7% |
Benefits & Assistance (21791 zip code)
| Households with: | Number# | Percent% | US AvgUS |
|---|---|---|---|
| Earnings: | 1,456 | 77.5% | 77.4% |
| Social Security income: | 615 | 32.7% | 31.0% |
| Retirement income: | 482 | 25.7% | 21.8% |
| Supplemental Security Income (SSI): | 75 | 4.0% | 4.5% |
| Cash public assistance income: | 56 | 3.0% | 1.8% |
| SNAP (food stamps) benefits: | 153 | 8.1% | 11.4% |
Housing Types (21791 zip code)
| Structure Type | Units | Percent% | US AvgUS |
|---|---|---|---|
| 1-unit, detached: | 1,801 | 90.5% | 61.4% |
| 1-unit, attached: | 54 | 2.7% | 6.1% |
| 2 units: | 55 | 2.8% | 3.4% |
| 3 or 4 units: | 30 | 1.5% | 4.3% |
| 5 to 9 units: | 42 | 2.1% | 4.6% |
| 10 to 19 units: | 0 | 0.0% | 4.3% |
| 20 or more units: | 0 | 0.0% | 9.9% |
| Mobile home: | 7 | 0.4% | 5.8% |
| Boat, RV, van, etc.: | 0 | 0.0% | 0.1% |
Year Structure Built (21791 zip code)
| Year Built | Units | Percent% | US AvgUS |
|---|---|---|---|
| Built 2020 or later: | 12 | 0.6% | 0.6% |
| Built 2010 to 2019: | 32 | 1.6% | 8.2% |
| Built 2000 to 2009: | 127 | 6.4% | 13.5% |
| Built 1990 to 1999: | 116 | 5.8% | 13.2% |
| Built 1980 to 1989: | 177 | 8.9% | 13.2% |
| Built 1970 to 1979: | 270 | 13.6% | 14.6% |
| Built 1960 to 1969: | 308 | 15.5% | 10.2% |
| Built 1950 to 1959: | 84 | 4.2% | 9.9% |
| Built 1940 to 1949: | 114 | 5.7% | 4.6% |
| Built 1939 or earlier: | 749 | 37.7% | 12.0% |
Bedrooms (21791 zip code)
| Number of Bedrooms | Units | Percent% | US AvgUS |
|---|---|---|---|
| No bedroom (studio): | 3 | 0.2% | 2.4% |
| 1 bedroom: | 109 | 5.5% | 3.0% |
| 2 bedrooms: | 361 | 18.1% | 9.1% |
| 3 bedrooms: | 962 | 48.4% | 15.9% |
| 4 bedrooms: | 433 | 21.8% | 18.8% |
| 5 or more bedrooms: | 121 | 6.1% | 17.6% |
Heating Fuel (21791 zip code)
| Fuel Type | Units | Percent% | US AvgUS |
|---|---|---|---|
| Utility gas: | 22 | 1.2% | 47.1% |
| Bottled, tank, or LP gas: | 131 | 7.0% | 4.9% |
| Electricity: | 738 | 39.3% | 40.2% |
| Fuel oil, kerosene, etc.: | 688 | 36.6% | 4.2% |
| Coal or coke: | 0 | 0.0% | 0.1% |
| Wood: | 234 | 12.5% | 1.5% |
| Solar energy: | 0 | 0.0% | 0.1% |
| Other fuel: | 44 | 2.3% | 0.5% |
| No fuel used: | 22 | 1.2% | 0.2% |
Vehicles Available (21791 zip code)
| Vehicles | Households | Percent% | US AvgUS |
|---|---|---|---|
| No vehicle available: | 40 | 2.1% | 8.3% |
| 1 vehicle available: | 371 | 19.7% | 32.6% |
| 2 vehicles available: | 597 | 31.8% | 37.0% |
| 3 or more vehicles available: | 871 | 46.4% | 22.1% |
Home Value Distribution (21791 zip code)
| Value Range | Owner Units | Percent% | US AvgUS |
|---|---|---|---|
| Less than $50,000: | 28 | 1.8% | 5.7% |
| $50,000 to $99,999: | 3 | 0.2% | 7.8% |
| $100,000 to $149,999: | 72 | 4.7% | 9.2% |
| $150,000 to $199,999: | 104 | 6.8% | 10.8% |
| $200,000 to $299,999: | 344 | 22.5% | 19.9% |
| $300,000 to $499,999: | 626 | 40.9% | 24.1% |
| $500,000 to $999,999: | 298 | 19.5% | 17.0% |
| $1,000,000 or more: | 55 | 3.6% | 5.6% |
Housing Costs (21791 zip code)
| Value | US AvgUS | |
|---|---|---|
| Median owner costs (with mortgage): | $1,782 / mo. | $1,828 / mo. |
| Median owner costs (no mortgage): | $557 / mo. | $584 / mo. |
| Median gross rent: | $1,156 / mo. | $1,268 / mo. |
| Average household size (owner-occupied): | 2.67 | 2.53 |
| Average household size (renter-occupied): | 2.19 | 2.38 |
Households (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Total households: | 1,879 | -- | -- |
| Married-couple households: | 1,057 | 56.3% | 47.5% |
| Cohabiting couple households: | 380 | 20.2% | 7.0% |
| Male householder, no spouse: | 416 | 22.1% | 5.4% |
| Female householder, no spouse: | 239 | 12.7% | 12.7% |
| Householder living alone: | 561 | 29.9% | 28.6% |
| 65 years and over living alone: | 612 | 32.6% | 11.8% |
| Average household size: | 2.58 | -- | 2.53 |
| Average family size: | 3.08 | -- | -- |
Marital Status (21791 zip code)
| Population 15 years and over | Number# | Percent% | US AvgUS |
|---|---|---|---|
| Total: | 2,277 | -- | -- |
| Never married: | 811 | 35.6% | 37.0% |
| Now married: | 1,166 | 51.2% | 49.5% |
| Separated: | 81 | 3.6% | 1.5% |
| Widowed: | 210 | 9.2% | 2.6% |
| Divorced: | 430 | 18.9% | 9.3% |
School Enrollment (21791 zip code)
| Population 3 years and over | Number# | Percent% | US AvgUS |
|---|---|---|---|
| Enrolled in school: | 942 | -- | -- |
| Nursery school, preschool: | 48 | 5.1% | 5.8% |
| Kindergarten: | 21 | 2.2% | 5.0% |
| Elementary school (grades 1-8): | 388 | 41.2% | 40.5% |
| High school (grades 9-12): | 334 | 35.5% | 21.4% |
| College or graduate school: | 151 | 16.0% | 27.3% |
Veterans & Disability (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Civilian population 18 years and over: | 3,858 | -- | -- |
| Veterans: | 511 | 13.2% | 6.3% |
| Civilian noninstitutionalized population: | 4,847 | -- | -- |
| With a disability: | 623 | 12.9% | 13.4% |
| Under 18 with disability: | 24 | 3.9% | 5.8% |
| 18 to 64 with disability: | 401 | 64.4% | 10.4% |
| 65 and over with disability: | 198 | 31.8% | 33.4% |
Mobility (Residence 1 Year Ago) (21791 zip code)
| Population 1 year and over | Number# | Percent% | US AvgUS |
|---|---|---|---|
| Same house: | 4,446 | 91.6% | 86.9% |
| Different house: | 351 | 7.2% | 13.1% |
| Same county: | 175 | 49.9% | 7.0% |
| Different county: | 176 | 50.1% | 3.2% |
| Different state: | 51 | 14.5% | 2.5% |
| Abroad: | 0 | 0.0% | 0.4% |
Place of Birth (21791 zip code)
| Number# | Percent% | US AvgUS | |
|---|---|---|---|
| Native born: | 4,743 | 97.7% | 86.2% |
| Foreign born: | 16 | 0.3% | 13.9% |
| Naturalized citizen: | 112 | 700.0% | 52.7% |
| Not a citizen: | 112 | 700.0% | 47.3% |
| Foreign-born by region: | -- | -- | -- |
| Europe: | 112 | 700.0% | 10.5% |
| Asia: | 15 | 93.8% | 31.3% |
| Africa: | 0 | 0.0% | 5.5% |
| Oceania: | 0 | 0.0% | 0.5% |
| Latin America: | 31 | 193.8% | 50.0% |
| Northern America: | 0 | 0.0% | 2.2% |
Language Spoken at Home (21791 zip code)
| Population 5 years and over | Number# | Percent% | US AvgUS |
|---|---|---|---|
| Total: | 4,569 | -- | -- |
| English only: | 4,498 | 98.4% | 78.3% |
| Language other than English: | 71 | 1.6% | 21.5% |
| By language: | -- | -- | -- |
| Spanish: | 32 | 0.7% | 13.3% |
| Other Indo-European languages: | 33 | 0.7% | 3.5% |
| Asian/Pacific Island languages: | 6 | 0.1% | 3.5% |
| Other languages: | 0 | 0.0% | 1.0% |
Computers & Internet (21791 zip code)
| Households | Percent% | US AvgUS | |
|---|---|---|---|
| Households with a computer: | 1,879 | 100.0% | 93.1% |
| Households with broadband internet: | 1,669 | 88.8% | 89.4% |
Union Bridge, MD21791