99031 ZIP Code Profile, Map, Data & Demographics

Related Place Profiles:
Spangle, WA

ZIP Code 99031: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Spangle, WA 99031

  • ZIP Code Type: STANDARD
  • County: Spokane County
  • Centroid: Latitude 47.432, Longitude -117.371
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes
  • Businesses Addresses: 38
  • PO Box Addresses: 176
  • Residential Addresses: 376
    • Multi-Family Addresses: 0
    • Single Family Addresses: 376

The ZIP Code maps and database are updated 4 times per year.
Database updated: April 1, 2024, Maps updated: May 1, 2024.


Spangle, WA 99031 Data & Demographics (As of July 1, 2023)


Total Population 1,642 (100%)
Population in Households 1,479 (90.1%)
Population in Families 1,152 (70.2%)
Population in Group Quarters1 163 ( 9.9%)
Population Density 22
Diversity Index2 33


Median Household Income $73,822
Average Household Income $99,706
% of Income for Mortgage4 31%
Per Capita Income $34,281
Wealth Index5 96
Socioeconomic Status Index6 Moderate (54.9)


Total HU (Housing Units) 585 (100%)
Owner Occupied HU 393 (67.2%)
Renter Occupied HU 170 (29.1%)
Vacant Housing Units 22 ( 3.8%)
Median Home Value $379,268
Average Home Value $382,443
Housing Affordability Index3 80


Total Households 563
Average Household Size 2.63
Family Households 387
Average Family Size 3.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population -0.46% 0.12%
Households 0.72% 0.25%
Families   0.56%
Median Household Income   3.04%
Per Capita Income   4.79%
Owner Occupied HU   0.45%

Spangle, WA 99031 - Peer Comparisons by Rank and Percentile

The table below compares 99031 to the other 590 ZIP Codes in Washington by rank and percentile using July 1, 2023 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 # 385 35th
Population Density # 417 29th
Median Household Income # 287 52nd
Housing Affordability Index # 405 69th
Per Capita Income # 397 33rd
Diversity Index # 449 24th

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

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