🇺🇸 United States ZIP Code

STANDARD

94951

Penngrove

ZIP Code 94951 is a standard zip code serving Penngrove, Penngrove, California (CA), in Sonoma County, United States. It has an estimated population of 4,124 with a median household income of $90,027. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: Sonoma
City: Penngrove
Timezone: America/Los_Angeles

Coordinates

Latitude: 38.315300
Longitude: -122.648300

Geographic Details

Land Area: 14.66 mi²
Population Density: 281.0 people per mi² (65th percentile)
Bounding Box: 38.358013°N, 38.276316°S, -122.577437°E, -122.708336°W

With 4,124 residents spread across 14.66 square miles, this area has a population density of 281.0 people per square mile.

Demographics

4,124

Population

55th percentile

$90,027

Median Income

90th percentile

$768,200

Median Home Value

95th percentile

14.66 mi²

Land Area

The median household income in 94951 is $90,027, and the median home value is $768,200. This places the area in the top 25% nationally for household income.

Housing

1,794

Total Units

1,659

Occupied Units

92.5%

Occupancy Rate

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

92870

Placentia

$78,730

95664

Pilot Hill

$89,141

95139

San Jose

$92,421

91901

Alpine

$79,792

94561

Oakley

$76,693

95757

Elk Grove

$84,297

94551

Livermore

$95,716

95864

Sacramento

$79,778

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.