Zip Code 06437
Guilford, Connecticut — New Haven County
📍 ZIP code 06437 is in Guilford, New Haven County, Connecticut.
ZIP code 06437 is located in Guilford, New Haven County, Connecticut. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 22,037. The area code for ZIP code 06437 is 860.
Quick Answer
Zip code 06437 is in Guilford, Connecticut (New Haven County). It has a population of 22,037, median household income of $130,036, and median home value of $491,300.
Population
22,037
Income
$130,036
Home Value
$491,300
Climate
82°F / 23°F
About Zip Code 06437
Zip code 06437 is located in Guilford, Connecticut, within New Haven County. Home to approximately 22,037 residents, this area sits at an elevation of 127 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 860.
The median household income is $130,036 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $491,300, and the cost of living index is 166 (66% above the national average of 100).
Summers average a high of 82°F while winters drop to 23°F. The area receives about 42 in of rain and 24 in of snow annually. The zip code covers 47.1 square miles of land area and 2.4 square miles of water.
Key Statistics
22,037
$130,036
$491,300
Eastern (EST/EDT)
860
127 ft
47.1 sq mi
50.7
9,773
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Compare With Nearby Zip Codes
| Metric | 06437 | 06443 | 06471 | 06472 | 06405 | 06419 |
|---|---|---|---|---|---|---|
| City | Guilford, CT | Guilford, CT | North Branford, CT | Northford, CT | Branford, CT | Killingworth, CT |
| Population | 22,037 | 17,577 | 7,073 | 6,414 | 28,090 | 6,219 |
| Median Income | $130,036 | $168,341 | $120,885 | $108,333 | $97,223 | $132,739 |
| Home Value | $491,300 | $534,800 | $364,900 | $371,800 | $388,300 | $388,500 |
| Cost of Living | 166 | 188 | 137 | 135 | 128 | 147 |
| Median Age | 50.7 | 51.4 | 49.8 | 45.6 | 54.4 | 51.8 |
Cost of Living
100 = National Average. Guilford's cost of living is 66% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
3.8x
Demographics
Zip code 06437 has a population of 22,037 people with a median age of 50.7. There are 9,773 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Guilford (06437) population trend from 2010 to 2024
↑ 41.0%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
82°F
23°F
42 in
24 in
Guilford experiences warm summers with average highs around 82°F. Winters are cool with lows averaging 23°F. The area receives about 24 in of snow per year.
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Housing & Economy
Median Home Value
$491,300
Median Household Income
$130,036
With 9,773 housing units across 47.1 square miles, 06437 has a housing density of 207 units per square mile. The home price-to-income ratio is 3.8x.
Location & Geography
Latitude
41.3318°
Longitude
-72.6968°
Land Area
47.1 sq mi
Water Area
2.4 sq mi
Nearby Zip Codes
Zip codes closest to 06437 (Guilford, CT) with distances:
All Zip Codes in Guilford, CT
Other zip codes serving Guilford:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 06437's $130,036. A way to compare Guilford to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 06437 (Guilford, CT). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Guilford, Connecticut?
Guilford, Connecticut uses zip code 06437 along with 1 other zip codes.
What county is zip code 06437 in?
Zip code 06437 is located in New Haven County, Connecticut.
What is the population of zip code 06437?
The population of zip code 06437 is 22,037 with a median age of 50.7.
Is 06437 in Guilford, Connecticut?
Yes, zip code 06437 is in Guilford, New Haven County, Connecticut. The area code is 860.
Frequently Asked Questions
What city is zip code 06437 in?
Zip code 06437 is in Guilford, Connecticut. It is part of New Haven County and uses the Eastern (EST/EDT) timezone.
What is zip code 06437?
Zip code 06437 is a U.S. postal code in Guilford, Connecticut (New Haven County). It has a population of 22,037 and covers 47.1 square miles.
What is the population of zip code 06437?
The population of zip code 06437 (Guilford, CT) is 22,037 with a median age of 50.7. There are approximately 9,773 housing units in this area.
What is the median income in zip code 06437?
The median household income in zip code 06437 (Guilford, CT) is $130,036 per year. The cost of living index is 166 (100 = national average).
What is the average home price in zip code 06437?
The median home value in zip code 06437 (Guilford, CT) is $491,300. The cost of living index is 166 compared to the national average of 100.
What county is zip code 06437 in?
Zip code 06437 is located in New Haven County, Connecticut. The primary city is Guilford.
What is the area code for zip code 06437?
Zip code 06437 in Guilford, CT uses area code 860. It is located in the Eastern (EST/EDT) timezone.
Is zip code 06437 a good place to live?
Zip code 06437 (Guilford, CT) has a cost of living index of 166 (100 = national average), a median household income of $130,036, and median home values of $491,300. The median age is 50.7. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 06437?
The cost of living index for zip code 06437 (Guilford, CT) is 166, where 100 represents the national average. This area is above the national average. Median home value: $491,300.
What schools serve zip code 06437?
Zip code 06437 in Guilford, Connecticut is served by the local school district of New Haven County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.