Eldersburg is a community in Carroll County, Maryland, home to about 31,695 people across 40 square miles. Its ZIP codes are 21104 and 21784, and parts of 21048 and 21797 are in Eldersburg too.
Homes sold for a median of $250 per square foot across 2 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Mostly Eldersburg; also Ellicott City
Mostly Eldersburg; also Sykesville
Part is in Eldersburg
Part is in Eldersburg, part in Lisbon
Each card is that ZIP code’s whole market, including any part outside Eldersburg. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Eldersburg’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Baltimore/Washington International Thurgood Marshall Airport (BWI)24 miles away |
|---|---|
| Nearest city of 250,000+ | Baltimore, MD21 miles away |
| Nearest city of 1 million+ | Philadelphia, PA105 miles away |
Straight-line distances from the center of Eldersburg; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Eldersburg had 32,582 residents in the 2020 census, up 17% since 2000.
It’s the 39th largest of 527 towns in Maryland by population.
Carroll County grew from 33,860 residents in 1900 to 172,891 in 2020.
Carroll County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 25°F. About 48 inches of rain and melted snow fall in a typical year, with about 31 inches of snow.
Source: NOAA 1991–2020 climate normals, Damascus 3 Ssw, MD weather station (19 miles away).
53,981 jobs at 4,279 businesses in Carroll County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
466 doctors and other health care providers list an office in Eldersburg’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 41 |
|---|---|
| Specialist doctors | 16 |
| Dentists | 30 |
| Nurse practitioners and physician assistants | 71 |
| Mental health providers | 198 |
| Physical and occupational therapists | 94 |
| Optometrists | 3 |
| Chiropractors | 13 |
| Pharmacies | 15 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (8 nearby)
Grocery stores (5 nearby)
Pharmacies (3 nearby)
Libraries (1 nearby)
Museums
Counts are within about 4 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Carroll County Public Schools, Howard County Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Carrolltowne ElementarySykesville | Pre-K–5 | 593 | Public | 3.4 mi |
| Eldersburg ElementarySykesville | Pre-K–5 | 470 | Public | 1.9 mi |
| Linton Springs ElementarySykesville | Pre-K–5 | 759 | Public | 1.6 mi |
| Mechanicsville ElementarySykesville | Pre-K–5 | 510 | Public | 2.5 mi |
| Piney Ridge ElementarySykesville | Pre-K–5 | 578 | Public | 2.5 mi |
| Freedom District ElementarySykesville | K–5 | 627 | Public | 1.7 mi |
| Mount View MiddleMarriottsville | 6–8 | 881 | Public | 8.2 mi |
| Oklahoma Road MiddleSykesville | 6–8 | 816 | Public | 3.0 mi |
| Sykesville MiddleSykesville | 6–8 | 697 | Public | 4.4 mi |
| Century HighSykesville | 9–12 | 1,101 | Public | 1.7 mi |
| Liberty HighSykesville | 9–12 | 1,007 | Public | 1.8 mi |
| Marriotts Ridge HighMarriottsville | 9–12 | 1,741 | Public | 8.1 mi |
| South Carroll HighSykesville | 9–12 | 933 | Public | 4.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Immanuel Montessori SchoolSykesville | Pre-K–K | 4 | Nonsectarian | 5.0 mi |
| St Stephens Classical Christian AcademyEldersburg | Pre-K–8 | 109 | Episcopal | 4.0 mi |
| ChapelgatechristianacademyMarriottsville | K–12 | 386 | Presbyterian | 10.0 mi |
| The Legacy SchoolEldersburg | 1–8 | 96 | Nonsectarian | 1.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Sykesville, Ellicott City and Lisbon.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.