Guilford, CT 06437 ZIP Code Profile

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Guilford, CT

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ZIP Code 06437: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Guilford, CT 06437

  • ZIP Code Type: STANDARD
  • County: New Haven County
  • Centroid: Latitude 41.316, Longitude -72.696
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 925
  • PO Box Addresses: 238
  • Residential Addresses: 9,119
    • Multi-Family Addresses: 227
    • Single Family Addresses: 8,892

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


06437 ZIP Code Map

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Guilford, CT 06437 Data & Demographics (As of July 1, 2017)


Total Population 22,722
Daytime Population: Workers 8,721
Daytime Population: Residents 10,509
Total Daytime Population (TDP) 19,230
Ratio TDP/Total Population1 0.85
Population in Households 22,416
Population in Familes 19,118
Population in Group Qrtrs 306
Population Density2 480
Diversity Index3 22


Median Household Income $105,101
Average Household Income $143,610
Per Capita Income $55,771


Total Housing Units 9,621 (100%)
Owner Occupied HU 7,301 (75.9%)
Renter Occupied HU 1,467 (15.2%)
Vacant Housing Units 853 ( 8.9%)
Median Home Value $421,141
Average Home Value $485,002


Total Households 8,768
Average Household Size 2.56
Family Households 6,305
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.21% 0.2%
Households 0.09% 0.12%
Families 0.0% 0.07%
Median Household Income   1.22%
Per Capita Income   1.98%

Guilford, CT 06437 - Peer Comparisons by Rank and Percentile

The table below compares 06437 to the other 275 ZIP Codes in Connecticut by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 58 79th
Population Density # 149 46th
Diversity Index # 173 37th
Median Household Income # 54 81st
Per Capita Income # 37 87th

Additional comparisons and rankings can be made with a VERY EASY TO USE Connecticut Census Data Comparison Tool.

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