Derby is a town in New Haven County, Connecticut, home to about 12,231 people across 5.1 square miles. Its ZIP code is 06418.
Homes sold for a median of $231 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 Derby. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Derby’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)47 miles away |
|---|---|
| Closer regional airport | Tweed New Haven Airport (HVN)11 miles away |
| Nearest city of 250,000+ | New York, NY64 miles away |
Straight-line distances from the center of Derby; 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.
Derby had 12,325 residents in the 2020 census, down 1% since 2000.
It’s the 86th 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 18°F. About 52 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Ansonia 1 Ne, CT weather station (2 miles away).
326 doctors and other health care providers list an office in Derby.
Nearest hospitals
Providers with an office here
| Primary care doctors | 51 |
|---|---|
| Specialist doctors | 62 |
| Dentists | 13 |
| Nurse practitioners and physician assistants | 88 |
| Mental health providers | 92 |
| Physical and occupational therapists | 15 |
| Optometrists | 1 |
| Chiropractors | 4 |
| 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 (11 nearby)
Grocery stores (4 nearby)
Pharmacies (2 nearby)
Libraries (5 nearby)
Museums (1 nearby)
Theaters and performance venues (1 nearby)
Counts are within about 1.5 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 Derby School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Little Raiders UniversityDerby | Pre-K | 63 | Public | 1.2 mi |
| Bradley SchoolDerby | K–5 | 244 | Public | 0.9 mi |
| Irving SchoolDerby | K–5 | 322 | Public | 0.5 mi |
| Derby Middle SchoolDerby | 6–8 | 300 | Public | 1.3 mi |
| Derby High SchoolDerby | 9–12 | 360 | Public | 1.2 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.