🇺🇸 United States ZIP Code

STANDARD

03858

Newton

ZIP Code 03858 is a standard zip code serving Newton, Newton, New Hampshire (NH), in Rockingham County, United States. It has an estimated population of 4,603 with a median household income of $78,819. 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: Rockingham
City: Newton
Timezone: America/New_York

Coordinates

Latitude: 42.867800
Longitude: -71.042000

Geographic Details

Land Area: 9.91 mi²
Water Area: 0.15 mi²
Population Density: 465.0 people per mi² (70th percentile)
Bounding Box: 42.896033°N, 42.833089°S, -70.997454°E, -71.087702°W

With 4,603 residents spread across 9.91 square miles, this area has a population density of 465.0 people per square mile.

Demographics

4,603

Population

55th percentile

$78,819

Median Income

90th percentile

$280,000

Median Home Value

85th percentile

9.91 mi²

Land Area

The median household income in 03858 is $78,819, and the median home value is $280,000. This places the area in the top 25% nationally for household income.

Housing

1,751

Total Units

1,667

Occupied Units

95.2%

Occupancy Rate

Similar ZIP Codes in New Hampshire

ZIP codes with similar median household income in New Hampshire.

03226

Center Harbor

$69,861

03254

Moultonborough

$72,110

03216

Andover

$71,466

03745

Cornish

$71,875

03824

Durham

$71,250

03467

Westmoreland

$75,234

03855

New Durham

$78,472

03865

Plaistow

$75,224

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.