Southold, NY 11971 ZIP Code Profile

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Southold, NY

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ZIP Code 11971: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Southold, NY 11971

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 334
  • Single Family Addresses: 2,513
  • Multi-Family Addresses: 38
  • County: Suffolk County
  • Centroid: Latitude 41.058, Longitude -72.416
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

Neighborhood Data

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11971 ZIP Code Map

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Southold, NY 11971 Data & Demographics (As of July 1, 2017)


Total Population 6,089
Daytime Population: Workers 2,116
Daytime Population: Residents 3,321
Total Daytime Population (TDP) 5,437
Ratio TDP/Total Population1 0.89
Population in Households 6,055
Population in Familes 4,908
Population in Group Qrtrs 34
Population Density2 590
Diversity Index3 33


Median Household Income $78,806
Average Household Income $108,682
Per Capita Income $45,459


Total Housing Units 4,095 (100%)
Owner Occupied HU 2,105 (51.4%)
Renter Occupied HU 432 (10.5%)
Vacant Housing Units 1,558 (38.0%)
Median Home Value $582,844
Average Home Value $651,888


Total Households 2,537
Average Household Size 2.39
Family Households 1,710
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 1.04% 0.85%
Households 0.93% 0.77%
Families 0.79% 0.68%
Median Household Income   1.82%
Per Capita Income   2.08%

Southold, NY 11971 - Peer Comparisons by Rank and Percentile

The table below compares 11971 to the other 1,745 ZIP Codes in New York 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 # 671 62nd
Population Density # 633 64th
Diversity Index # 625 64th
Median Household Income # 402 77th
Per Capita Income # 261 85th

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

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