ZIP Code 06437
standardSource:
Guilford · New Haven County · Connecticut
- Population
- 22,375
- Median income
- $137,615
- Median home value
- $515,000
- Bachelor's or higher
- 60.5%
- Land area
- 121.9 sq mi
184/sq mi
▲ 80% vs US
higher than 95% of US ZIPs
▲ 85% vs US
higher than 88% of US ZIPs
Median age 51.2
New York
ZIP code 06437 in Guilford, Connecticut has a population of 22,375. The median household income is $137,615, which is 80% above the national average. Median home value is $515,000, 85% above the US average. 60.5% of residents hold a bachelor's degree or higher.
ZIP code 06437 is classified by USPS as a standard delivery area and covers roughly 121.9 square miles in Guilford, New Haven County, Connecticut. The area is home to 22,375 residents, producing a population density of 184 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 06437 against Connecticut and the nation.
On the economic side, the median household income for ZIP 06437 sits at $137,615 (22% above the Connecticut average), while per-capita income is $73,108. The poverty rate stands at 2.8% and the unemployment rate at 4.9%. On housing, the median home value is $515,000 (19% above the state average) with median rent at $1,717 per month, and 83.6% of occupied units are owner-occupied, a direct signal of whether 06437 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 60.5% of adults hold a bachelor's degree or higher, the median age is 51.2, and the average commute is 26 minutes. We also surface 8 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing New Haven County, so you can benchmark 06437 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 06437
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 06437.
- Health care and social assistance
Health care and social assistance
107 establishments
- Retail trade
Retail trade
82 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
81 establishments
- Other services (except public administration)
Other services (except public administration)
78 establishments
- Construction
Construction
71 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 06437, Guilford, CT · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
22,375
Population
121.9
Area (sq mi)
184
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 06437?
51.2
Median Age
50.3%
Male
49.7%
Female
9.4%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$137,615
Median Household Income
+22% vs state
$73,108
Per Capita Income
2.8%
Poverty Rate
4.9%
Unemployment Rate
25.9 min
Mean Commute Time
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
9,825
Total Housing Units
8,856
Occupied Units
969
Vacant Units
2.47
Avg Household Size
Occupancy Type
$515,000
Median Home Value
+19% vs state
$1,717
Median Rent
1974
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+10.0%
YoY Change (2024)
220
HPI Index (2000 = 100)
+120%
Total Change Since 2000
Home values in ZIP 06437 have increased 10.0% over the past year (2024). Since 2000, this ZIP has seen +120% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +3.3% | 148 |
| 2021 | +9.9% | 163 |
| 2022 | +14.4% | 187 |
| 2023 | +7.0% | 200 |
| 2024 | +10.0% | 220 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 669 business establishments in ZIP 06437, employing approximately 8,094 people with a combined annual payroll of $614,889,000.
669
Businesses
8,094
Employees
$614.9M
Annual Payroll
16
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Health care and social assistance | 107 | 16.0% |
| Retail trade | 82 | 12.3% |
| Professional, scientific, and technical services | 81 | 12.1% |
| Other services (except public administration) | 78 | 11.7% |
| Construction | 71 | 10.6% |
| Finance and insurance | 46 | 6.9% |
| Accommodation and food services | 46 | 6.9% |
| Administrative and support and waste management and remediation services | 35 | 5.2% |
| Wholesale trade | 29 | 4.3% |
| Real estate and rental and leasing | 19 | 2.8% |
| Arts, entertainment, and recreation | 18 | 2.7% |
| Educational services | 16 | 2.4% |
| Manufacturing | 15 | 2.2% |
| Information | 12 | 1.8% |
| Transportation and warehousing | 11 | 1.6% |
| Management of companies and enterprises | 3 | 0.5% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 06437 vs 06443 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 06443 | Madison, CT | 18,269 | 3.8 mi |
| 06471 | North Branford, CT | 7,720 | 3.9 mi |
| 06472 | Northford, CT | 6,853 | 5.2 mi |
| 06422 | Durham, CT | 7,388 | 8.9 mi |
| 06405 | Branford, CT | 27,860 | 6.2 mi |
| 06419 | Killingworth, CT | 6,525 | 7.0 mi |
| 06492 | Wallingford, CT | 45,241 | 10.2 mi |
| 06441 | Higganum, CT | 5,438 | 11.0 mi |
More ZIP Codes in New Haven County
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Frequently Asked Questions
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How many businesses are in ZIP code 06437? ▼
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How have home values changed in ZIP code 06437? ▼
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What percentage of residents own vs. rent in ZIP 06437? ▼
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ZIP Code Research Guides
Official Data Resources for Guilford, CT
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.