Saint John, WA · standard
ZIP Code 99171
Whitman County, Washington - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 959
- 1/sq mi Low-density area
- $53,333
- Median income Below-median income area
- $220,500
- Median home value Near-median home value
- 25.4%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Saint John pairs one of the lowest household incomes in the country with below-median home values, in a rural, homeowner-dominated area.
- 19th pct
- household income, US ZIPs
- 49th pct
- home value, US ZIPs
- 1
- people per sq mi
- 78%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 99171 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 99171 (Saint John, WA) rose +14.3% from 2023 to 2024.
ZIP code 99171 is a sparsely populated ZIP (a standard USPS delivery area) in Saint John, Whitman County, Washington, home to just 959 residents across 685.0 square miles, a density of 1 people per square mile, in the Los Angeles time zone.
ZIP 99171 reports a modest median household income of $53,333 (41% below the average Washington ZIP), while per-capita income is $32,685. The poverty rate is 13.1%, with unemployment at 5.3%; those measures add context to the income figure. Home values sit below the statewide ZIP benchmark: the median is $220,500 (57% below the average Washington ZIP), and median rent is $929; owner occupancy is 77.5%.
Educational attainment sits below the national norm: 25.4% of adults hold a bachelor's degree or higher, the median age is 55.7, and the average commute is -. No nearby ZIP peer set is available for this delivery area, so the Washington and national benchmarks above are the appropriate context for 99171.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 99171
Top 5 sectors by establishment count in Saint John, WA
Which industries have the most business establishments in ZIP 99171.
- Wholesale trade
Wholesale trade
10 establishments
- Retail trade 3
Retail trade
3 establishments
- Finance and insurance 3
Finance and insurance
3 establishments
- Other services (except public administration) 3
Other services (except public administration)
3 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 99171, Saint John, WA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
959
Population
685.0
Area (sq mi)
1
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 99171?
55.7
Median Age
44.6%
Male
55.4%
Female
3.5%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$53,333
Median Household Income
-41% vs state ZIP avg
$32,685
Per Capita Income
13.1%
Poverty Rate
5.3%
Unemployment Rate
How ZIP 99171 ranks among Washington ZIPs
Saint John, WA household income vs. every Washington ZIP code
Median household income among 547 reporting Washington ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$53,333 8th percentile higher than 8% of 547 Washington ZIPs
Each bar is a $20K-wide band; taller bars hold more Washington ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
452housing units
452
Total Housing Units
408
Occupied Units
44
Vacant Units
2.08
Avg Household Size
Occupancy Type
$220,500
Median Home Value
-57% vs state ZIP avg
$929
Median Rent
1954
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 28 business establishments in ZIP 99171, employing approximately 114 people with a combined annual payroll of $7,414,000.
28
Businesses
114
Employees
$7.4M
Annual Payroll
4
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Wholesale trade | 10 | 35.7% |
| Retail trade | 3 | 10.7% |
| Finance and insurance | 3 | 10.7% |
| Other services (except public administration) | 3 | 10.7% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 99171, both outside WA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Whitman County
Related Areas
Frequently Asked Questions
What county is ZIP code 99171 in?
ZIP code 99171 (Saint John) is located in Whitman County, Washington. Whitman County contains multiple ZIP codes, see the full list at /counties/whitman-wa.
What is the population of ZIP code 99171?
ZIP code 99171 in Saint John, WA has a population of 959 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 99171?
The median household income in ZIP 99171 is $53,333, which is 30% below the national average of $76,288.
What is the average home value in ZIP 99171?
The median home value in ZIP 99171 is $220,500, which is 21% below the national average of $278,155.
What is the demographic makeup of ZIP 99171?
The largest racial group in ZIP 99171 is White at 92.7%. Hispanic or Latino residents make up 1.9% of the population.
How many businesses are in ZIP code 99171?
ZIP code 99171 has 28 business establishments employing approximately 114 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 99171?
The top industries by establishment count in ZIP 99171 are: Wholesale trade (10), Retail trade (3), Finance and insurance (3). There are 4 industry sectors represented in total.
What is the education level in ZIP code 99171?
In ZIP code 99171, 49.5% of residents aged 25+ have a high school diploma or higher, and 25.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 99171?
In ZIP code 99171, approximately 77.5% of occupied housing units are owner-occupied and 22.5% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 99171?
The poverty rate in ZIP code 99171 is 13.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 99171's numbers, next.
- See how ZIP 99171 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Saint John, WA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.