🇺🇸 United States ZIP Code

STANDARD

99030

Rockford

ZIP Code 99030 is a standard zip code serving Rockford, Rockford, Washington (WA), in Spokane County, United States. It has an estimated population of 1,032 with a median household income of $56,053. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Washington (WA)
County: Spokane
City: Rockford
Timezone: America/Los_Angeles

Coordinates

Latitude: 47.452800
Longitude: -117.131800

Geographic Details

Land Area: 78.39 mi²
Population Density: 13.0 people per mi² (15th percentile)
Bounding Box: 47.588400°N, 47.390764°S, -117.039792°E, -117.238711°W

With 1,032 residents spread across 78.39 square miles, this area has a population density of 13.0 people per square mile.

Demographics

1,032

Population

25th percentile

$56,053

Median Income

65th percentile

$225,000

Median Home Value

75th percentile

78.39 mi²

Land Area

The median household income in 99030 is $56,053, and the median home value is $225,000.

Housing

446

Total Units

412

Occupied Units

92.4%

Occupancy Rate

Similar ZIP Codes in Washington

ZIP codes with similar median household income in Washington.

98665

Vancouver

$49,983

99347

Pomeroy

$51,637

98087

Lynnwood

$63,639

99003

Chattaroy

$62,948

99301

Pasco

$56,098

98249

Freeland

$59,142

98260

Langley

$59,931

99320

Benton City

$62,321

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.