Marlborough is a town in Hartford County, Connecticut, home to about 6,130 people across 23 square miles. Its ZIP code is 06447.
Homes sold for a median of $227 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Marlborough. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Marlborough’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Bradley International Airport (BDL)24 miles away |
|---|---|
| Nearest city of 250,000+ | Boston, MA88 miles away |
| Nearest city of 1 million+ | New York, NY102 miles away |
Straight-line distances from the center of Marlborough; 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.
Marlborough had 6,133 residents in the 2020 census, up 7% since 2000.
It’s the 122nd largest of 169 towns in Connecticut by population.
Hartford County grew from 195,480 residents in 1900 to 899,498 in 2020.
Hartford County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 20°F. About 42.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Hartford Brainard Fld, CT weather station (12 miles away).
54 doctors and other health care providers list an office in Marlborough.
Nearest hospitals
Providers with an office here
| Primary care doctors | 7 |
|---|---|
| Dentists | 3 |
| Nurse practitioners and physician assistants | 10 |
| Mental health providers | 15 |
| Physical and occupational therapists | 17 |
| Optometrists | 1 |
| Chiropractors | 1 |
| Pharmacies | 2 |
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 (2 nearby)
Grocery stores (1 nearby)
Pharmacies
Libraries (1 nearby)
Museums
Theaters and performance venues (1 nearby)
Counts are within about 3.5 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 Marlborough School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Elmer Thienes-Mary Hall Elementary SchoolMarlborough | Pre-K–6 | 458 | Public | 1.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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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.