LatestCoverageAll 50 states, D.C. and five territories now on the ledger|NewPuerto Rico's 78 municipios ledgered, municipio by municipio|FeatureAssessment appeal workspace — build a filing package from your own evidence|FeatureLiving reports — versioned, re-runnable, exportable|DevelopersMetered REST gateway · issued keys · signed webhooks|Live market readings · refreshed on loadAlbuquerque · NMMedian List$360K+2.5%|Austin · TXMedian List$550K-1.0%|Baltimore · MDMedian List$225K-6.3%|Bernalillo County · NMMedian List$364K+2.7%|Bexar County · TXMedian List$303K+3.7%|Boston · MAMedian List$859K+3.4%|Charlotte · NCMedian List$430K-0.1%|Chicago · ILMedian List$426K+9.3%|Clark County · NVMedian List$447K+0.1%|Columbus · OHMedian List$300K+0.6%|Cook County · ILMedian List$348K+5.1%|Dallas · TXMedian List$449K-0.1%|Davidson County · TNMedian List$465K-1.1%|Denver · COMedian List$569K+1.6%|Detroit · MIMedian List$105K-2.8%|Duval County · FLMedian List$297K-2.3%|El Paso · TXMedian List$260K+3.7%|Fort Worth · TXMedian List$332K-2.1%|Franklin County · OHMedian List$320K+3.2%|Fresno · CAMedian List$375K+2.1%|Harris County · TXMedian List$327K+0.6%|Houston · TXMedian List$340K+0.6%|Indianapolis · INMedian List$260K+2.3%|Jackson County · MOMedian List$275K+7.0%|Jacksonville · FLMedian List$309K-2.1%|Jefferson County · KYMedian List$248K-4.3%|Kansas City · MOMedian List$240K+4.3%|King County · WAMedian List$850K-4.0%|Las Vegas · NVMedian List$440K-1.1%|Los Angeles · CAMedian List$950K-0.5%|Louisville · KYMedian List$275K0.0%|Maricopa County · AZMedian List$458K-0.4%|Marion County · INMedian List$259K+3.7%|Mecklenburg County · NCMedian List$407K-5.3%|Memphis · TNMedian List$202K+2.5%|Mesa · AZMedian List$450K-3.1%|Milwaukee · WIMedian List$243K+5.7%|Multnomah County · ORMedian List$518K-1.2%|Nashville · TNMedian List$480K+1.0%|New York · NYMedian List$899K+0.5%|Oklahoma City · OKMedian List$275K-0.6%|Oklahoma County · OKMedian List$259K-0.7%|Philadelphia · PAMedian List$249K+0.3%|Phoenix · AZMedian List$480K0.0%|Pima County · AZMedian List$373K+0.9%|Portland · ORMedian List$640K-6.0%|Sacramento · CAMedian List$510K+4.0%|San Antonio · TXMedian List$236K-1.2%|San Diego · CAMedian List$994K+4.2%|San Francisco · CAMedian List$1.4M+1.7%|San Jose · CAMedian List$1.3M-11.9%|Santa Clara County · CAMedian List$1.3M+0.1%|Seattle · WAMedian List$874K-2.8%|Shelby County · TNMedian List$259K-2.4%|Suffolk County · MAMedian List$857K+7.3%|Tarrant County · TXMedian List$385K-1.2%|Travis County · TXMedian List$497K-5.3%|Tucson · AZMedian List$324K-0.9%|Wayne County · MIMedian List$160K0.0%|LatestCoverageAll 50 states, D.C. and five territories now on the ledger|NewPuerto Rico's 78 municipios ledgered, municipio by municipio|FeatureAssessment appeal workspace — build a filing package from your own evidence|FeatureLiving reports — versioned, re-runnable, exportable|DevelopersMetered REST gateway · issued keys · signed webhooks|Live market readings · refreshed on loadAlbuquerque · NMMedian List$360K+2.5%|Austin · TXMedian List$550K-1.0%|Baltimore · MDMedian List$225K-6.3%|Bernalillo County · NMMedian List$364K+2.7%|Bexar County · TXMedian List$303K+3.7%|Boston · MAMedian List$859K+3.4%|Charlotte · NCMedian List$430K-0.1%|Chicago · ILMedian List$426K+9.3%|Clark County · NVMedian List$447K+0.1%|Columbus · OHMedian List$300K+0.6%|Cook County · ILMedian List$348K+5.1%|Dallas · TXMedian List$449K-0.1%|Davidson County · TNMedian List$465K-1.1%|Denver · COMedian List$569K+1.6%|Detroit · MIMedian List$105K-2.8%|Duval County · FLMedian List$297K-2.3%|El Paso · TXMedian List$260K+3.7%|Fort Worth · TXMedian List$332K-2.1%|Franklin County · OHMedian List$320K+3.2%|Fresno · CAMedian List$375K+2.1%|Harris County · TXMedian List$327K+0.6%|Houston · TXMedian List$340K+0.6%|Indianapolis · INMedian List$260K+2.3%|Jackson County · MOMedian List$275K+7.0%|Jacksonville · FLMedian List$309K-2.1%|Jefferson County · KYMedian List$248K-4.3%|Kansas City · MOMedian List$240K+4.3%|King County · WAMedian List$850K-4.0%|Las Vegas · NVMedian List$440K-1.1%|Los Angeles · CAMedian List$950K-0.5%|Louisville · KYMedian List$275K0.0%|Maricopa County · AZMedian List$458K-0.4%|Marion County · INMedian List$259K+3.7%|Mecklenburg County · NCMedian List$407K-5.3%|Memphis · TNMedian List$202K+2.5%|Mesa · AZMedian List$450K-3.1%|Milwaukee · WIMedian List$243K+5.7%|Multnomah County · ORMedian List$518K-1.2%|Nashville · TNMedian List$480K+1.0%|New York · NYMedian List$899K+0.5%|Oklahoma City · OKMedian List$275K-0.6%|Oklahoma County · OKMedian List$259K-0.7%|Philadelphia · PAMedian List$249K+0.3%|Phoenix · AZMedian List$480K0.0%|Pima County · AZMedian List$373K+0.9%|Portland · ORMedian List$640K-6.0%|Sacramento · CAMedian List$510K+4.0%|San Antonio · TXMedian List$236K-1.2%|San Diego · CAMedian List$994K+4.2%|San Francisco · CAMedian List$1.4M+1.7%|San Jose · CAMedian List$1.3M-11.9%|Santa Clara County · CAMedian List$1.3M+0.1%|Seattle · WAMedian List$874K-2.8%|Shelby County · TNMedian List$259K-2.4%|Suffolk County · MAMedian List$857K+7.3%|Tarrant County · TXMedian List$385K-1.2%|Travis County · TXMedian List$497K-5.3%|Tucson · AZMedian List$324K-0.9%|Wayne County · MIMedian List$160K0.0%|
Property-class scope

The story of this market

The typical home in ZIP 21791 sells for about $370,300, or $165 per square foot.

Prices are up +2.4% from a year ago, so sellers still have some momentum. Homes take about 45 days to sell. HUD's fair market rent for a two-bedroom is $1,457 a month.

ZIP market report · consumer edition · quarterly refresh
Track this ZIP

ZIP 21791 — Union Bridge

Carroll County →Frederick County →spans 2 countiesrefreshed Sep 29, 20262 cycles retainednext refresh Oct 29, 2026
Market mood · neutral

The housing market in 21791 remains stable with modest year-over-year price appreciation. Demand is supported by local families, though limited inventory continues to constrain sales volume. Figures for specific metrics like price cuts and months of supply are estimated based on regional trends as precise ZIP-level data is not currently published.

Who this ZIP fits

This ZIP is well-suited for families and individuals seeking a rural or semi-rural lifestyle with access to larger employment centers in Frederick and Carroll counties.

Parent geography
Union Bridge · no city intel reportCarroll County →Maryland state →
Aerial view · ZIP boundaries2020 Census ZCTA boundary over current aerial imagery
Leaflet Imagery © Esri, Maxar, Earthstar Geographics
Land area · 119.2 km²Water area · 0.2 km²U.S. Census Bureau TIGERweb — 2020 Census ZCTA5 boundary
Median sale price
$370,300
+2.4% year over year
Corroborated · 1 anchor · 0% off nearest
Days on market
45 days
Active listings
28
Listings with price cuts
12%
share of active listings
Sale-to-list ratio
98.5%
of asking price
ZIP Market ScoreZIP-SCORE-1.3 · 4/4 sections graded
78
Composite · average of graded sections
Computed only from this report's published readings — sections without data are excluded, never estimated.
62
Growth/100

Median prices moved up 2.4% year over year.

74
Liquidity/100

Homes spend a median of 45 days on market with 3.2 months of supply — a fast-moving market.

75
Momentum/100

12% of listings have cut prices · homes sell at 98.5% of asking — demand is running ahead of supply.

99
Safety & stability/100

no recorded foreclosure-ledger notices (0.0 per 10,000 residents) · unemployment 2.0% · poverty 5.1% — a stable, low-distress profile.

Median price · ten-year history

Researched annual trajectory for this ZIP, from published historical series

2015201620172018201920202021202220232024202520272029$240,000$300,000$360,000$420,000$480,000

Solid: researched ten-year history · dotted: 1 / 3 / 5-year projection extended from the historical 4.7%/yr trend — a deterministic estimate, not a published forecast or guarantee.

Property tax · ten-year history

Median annual property tax paid on this ZIP's residential parcels

2015201620172018201920202021202220232024202520272029$2,500$3,000$3,500$4,000$4,500

Solid: researched ten-year history · dotted: 1 / 3 / 5-year projection extended from the historical 3.8%/yr trend — a deterministic estimate, not a published forecast or guarantee.

Census trends · population flowsACS 2019-2023 5-year estimates
Population change
+0.8%

versus the prior ACS vintage

Population base
5,340

ZCTA 21791

Area context
Schools & education

The area is served by Carroll County Public Schools, which generally maintain a reputation for solid academic performance relative to the state average.

Environmental & hazard

The region is subject to standard mid-Atlantic weather risks, including seasonal storms and occasional flooding in low-lying areas near the Monocacy River.

Growth & development

Economic momentum is driven by proximity to the Frederick and Westminster employment corridors, with a mix of agricultural heritage and increasing residential development.

Taxation

Composed from the ARED governance burden registry — tier-native tax structure (state + county + city + special districts), never averaged. State (Maryland) — Maryland Real Property Assessment and Taxation: Property is assessed at its phased-in use value. The tax is calculated by multiplying the assessed value by the applicable state and local tax rates.

Transportation & commute

Residents primarily rely on personal vehicles for commuting, with major access via MD-75 and MD-31 providing connections to Frederick and Westminster employment hubs.

Recreation & amenities

The area features rural landscapes, local parks in Union Bridge, and proximity to regional trails and outdoor recreation sites in northern Carroll County.

Rental market

The rental market is characterized by limited inventory and a mix of single-family home rentals and small-scale multi-family units.

Economy & employers

The local economy is anchored by agriculture, small-scale manufacturing, and service-sector businesses, with many residents commuting to larger employers in Frederick and Baltimore.

Transportation & infrastructure

Transportation is primarily automobile-dependent, with limited public transit options available for regional commuting.

Development pipeline

Development is largely focused on small-scale residential infill and the preservation of agricultural land.

County appraisal district

The Carroll County Bureau of Assessments manages property valuations, typically reassessing properties on a three-year cycle.

Special districts

Parcels are subject to Carroll County Public School district taxes and local municipal utility assessments where applicable.

Insurance & hazard market

Property insurance premiums are stable but reflect regional exposure to wind and storm-related risks common in Maryland.

Discovery profileACS 2019-2023 5-year estimates
Census profile · ZCTA 21791
Population
5,340
Median age
37.7 yrs
Owner-occupancy
82.4%
Median home value
$370,300
Median gross rent
$1,850
Median household income
$93,015
Median year built
1964
Vacancy rate
5.4%
Renter share
17.6%
Owner cost burden
22.1%
Renter cost burden
35.4%
Population change
+0.8%
Work-from-home share
18.5%
Mean commute
38.2 min
Bachelor's or higher
28.4%
Unemployment
2%
Poverty rate
5.1%
Avg household size
2.65
White
92.1%
Black or African American
2.5%
Hispanic or Latino
3.2%
Other
2.2%

Data retrieved from US Census Bureau ZCTA 21791 profile.

Public schools with an address here · 2

Public schools whose reported address is in this area (NCES). Not attendance boundaries — schools that serve residents may sit outside it. Check the district's address locator for assignment.

Union Bridge ElementaryElementary6/10Carroll County Public SchoolsServes the immediate town area.
Francis Scott Key HighHigh5/10Carroll County Public SchoolsRegional high school serving the 21791 area.
School districts
Carroll County Public SchoolsB+Large district serving the majority of the county with consistent performance.
Utilities & services
InternetXfinity/VerizonBroadband availability varies by specific location.
ElectricBGEPrimary provider for the region.
Water/SewerTown of Union BridgeMunicipal services provided within town limits.
Major employers & industries
Carroll County GovernmentPublic AdministrationMajor regional employer.
Local Agricultural OperationsAgricultureSignificant land use and economic contributor.
Major amenities · ZIP 21791
Theme, amusement & water parks
11 · 20 mi
Family fun & things to do
20+ · 13 mi
Parks, trails & nature
18 · 13 mi
Lakes, marinas & beaches
1 · 20 mi
Shopping & dining districts
12 · 13 mi

Theme parks, venues, golf, airports, museums, water and shopping across the area from Google Maps, ranked by popularity within the radius shown.

Amenities & attractions2 retained amenities
Inside this ZIP
Union Bridge Community Park
Park

Local recreational space serving the town and surrounding area.

Western Maryland Railway Museum
Museum

Historical site highlighting the region's rail history.

Sources · 3 cited

Key-figure check: median price corroborated by the published ten-year series (2025) (within 12.5%).