Guilford is a town in New Haven County, Connecticut, home to about 22,054 people across 47 square miles. Its ZIP code is 06437.
Homes sold for a median of $301 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 Guilford. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Guilford’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)43 miles away |
|---|---|
| Closer regional airport | Tweed New Haven Airport (HVN)11 miles away |
| Nearest city of 250,000+ | New York, NY79 miles away |
Straight-line distances from the center of Guilford; 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.
Guilford had 22,073 residents in the 2020 census, up 3% since 2000.
It’s the 50th largest of 169 towns in Connecticut by population.
New Haven County grew from 269,163 residents in 1900 to 864,835 in 2020.
New Haven County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 82°F in summer, and winter lows average 23°F. About 41.8 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, New Haven Tweed Ap, CT weather station (10 miles away).
417 doctors and other health care providers list an office in Guilford.
Nearest hospitals
Providers with an office here
| Primary care doctors | 42 |
|---|---|
| Specialist doctors | 45 |
| Dentists | 26 |
| Nurse practitioners and physician assistants | 65 |
| Mental health providers | 135 |
| Physical and occupational therapists | 82 |
| Optometrists | 8 |
| Chiropractors | 14 |
| Pharmacies | 4 |
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 (14 nearby)
Grocery stores (7 nearby)
Pharmacies (1 nearby)
Libraries (3 nearby)
Museums (5 nearby)
Theaters and performance venues (1 nearby)
Counts are within about 4.5 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 Guilford School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Guilford Lakes SchoolGuilford | Pre-K–4 | 369 | Public | 1.0 mi |
| A. W. Cox SchoolGuilford | K–4 | 255 | Public | 2.0 mi |
| Calvin Leete SchoolGuilford | K–4 | 213 | Public | 2.7 mi |
| Melissa Jones SchoolGuilford | K–4 | 265 | Public | 4.0 mi |
| A. Baldwin Middle SchoolGuilford | 5–6 | 463 | Public | 1.9 mi |
| E. C. Adams Middle SchoolGuilford | 7–8 | 478 | Public | 1.7 mi |
| Guilford High SchoolGuilford | 9–12 | 1,008 | Public | 0.7 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.