Bel Air South is a community in Harford County, Maryland, home to about 58,137 people across 21 square miles. Its ZIP codes are 21009 and 21015, and parts of 21014 are in Bel Air South too.
Homes sold for a median of $202 per square foot across 2 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Mostly Bel Air South; also Abingdon and Edgewood
Mostly Bel Air South; also Bel Air North
Mostly Bel Air North; part is in Bel Air South
Each card is that ZIP code’s whole market, including any part outside Bel Air South. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Bel Air South’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)30 miles away |
|---|---|
| Nearest city of 250,000+ | Baltimore, MD22 miles away |
| Nearest city of 1 million+ | Philadelphia, PA72 miles away |
Straight-line distances from the center of Bel Air South; 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.
Bel Air South had 57,648 residents in the 2020 census, up 45% since 2000.
It’s the 15th largest of 527 towns in Maryland by population.
Harford County grew from 28,269 residents in 1900 to 260,924 in 2020.
Harford County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 25°F. About 47.2 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Aberdeen Phillips Fld, MD weather station (8 miles away).
79,488 jobs at 5,636 businesses in Harford County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
522 doctors and other health care providers list an office in Bel Air South’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 41 |
|---|---|
| Specialist doctors | 44 |
| Dentists | 47 |
| Nurse practitioners and physician assistants | 108 |
| Mental health providers | 127 |
| Physical and occupational therapists | 137 |
| Optometrists | 11 |
| Chiropractors | 7 |
| Pharmacies | 27 |
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 (22 nearby)
Grocery stores (8 nearby)
Pharmacies (4 nearby)
Libraries (2 nearby)
Museums (1 nearby)
Theaters and performance venues (2 nearby)
Counts are within about 3 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 Harford County Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Abingdon ElementaryAbingdon | Pre-K–5 | 641 | Public | 2.5 mi |
| Fountain Green ElementaryBel Air | Pre-K–5 | 443 | Public | 2.0 mi |
| Old Post Road ElementaryAbingdon | Pre-K–5 | 850 | Public | 4.5 mi |
| Prospect Mill ElementaryBel Air | Pre-K–5 | 579 | Public | 3.2 mi |
| William S. James ElementaryAbingdon | K–5 | 463 | Public | 2.3 mi |
| Harford Academy at Campus HillsBel Air | 1–12 | 141 | Special Education | 3.4 mi |
| Patterson Mill Middle SchoolBel Air | 6–8 | 716 | Public | 0.6 mi |
| C. Milton Wright HighBel Air | 9–12 | 1,291 | Public | 3.4 mi |
| Harford Technical HighBel Air | 9–12 | 954 | Career and Technical | 3.5 mi |
| Patterson Mill High SchoolBel Air | 9–12 | 839 | Public | 0.6 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Bridges Montessori of Towson, Inc.Bel Air | Pre-K–6 | 55 | Nonsectarian | 5.7 mi |
| Grace Classical AcademyBel Air | Pre-K–11 | 171 | Christian (no specific denomination) | 2.9 mi |
| Emmorton Baptist AcademyBel Air | K–12 | 44 | Baptist | 1.1 mi |
| The Highlands SchoolBel Air | 1–12 | 67 | Nonsectarian | 3.0 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 Bel Air North, Bel Air (Harford County), Abingdon and Edgewood.
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.