🇺🇸 United States ZIP Code

PO BOX

03231

East Andover

ZIP Code 03231 is a po box zip code serving East Andover, East Andover, New Hampshire (NH), in Merrimack County, United States. It has an estimated population of 202 with a median household income of $68,553. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: New Hampshire (NH)
County: Merrimack
City: East Andover
Timezone: America/New_York

Coordinates

Latitude: 43.459500
Longitude: -71.747600

Geographic Details

Land Area: 2.20 mi²
Water Area: 0.20 mi²
Population Density: 92.0 people per mi² (50th percentile)
Bounding Box: 43.485085°N, 43.445733°S, -71.703749°E, -71.776033°W

With 202 residents spread across 2.20 square miles, this area has a population density of 92.0 people per square mile.

Demographics

202

Population

5th percentile

$68,553

Median Income

80th percentile

$215,200

Median Home Value

75th percentile

2.20 mi²

Land Area

The median household income in 03231 is $68,553, and the median home value is $215,200. This places the area in the top 25% nationally for household income.

Housing

124

Total Units

Occupied Units

67.7%

Occupancy Rate

Similar ZIP Codes in New Hampshire

ZIP codes with similar median household income in New Hampshire.

03079

Salem

$76,497

03261

Northwood

$68,398

03858

Newton

$78,819

03848

Kingston

$65,579

03048

Greenville

$62,321

03042

Epping

$74,609

03851

Milton

$61,947

03461

Rindge

$61,875

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.