Plymouth, WA · standard
ZIP Code 99346
Benton County, Washington - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 352
- 1/sq mi Low-density area
- $50,865
- Median income Below-median income area
- $209,200
- Median home value Near-median home value
- 16.7%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Plymouth pairs one of the lowest household incomes in the country with below-median home values, in a rural, homeowner-dominated area.
- 15th pct
- household income, US ZIPs
- 46th pct
- home value, US ZIPs
- 1
- people per sq mi
- 95%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 99346 against every reporting US ZIP.
ZIP code 99346 is a sparsely populated ZIP (a standard USPS delivery area) in Plymouth, Benton County, Washington, home to just 352 residents across 320.0 square miles, a density of 1 people per square mile, in the Los Angeles time zone.
ZIP 99346 reports a modest median household income of $50,865 (44% below the average Washington ZIP), while per-capita income is $28,424. The poverty rate is 8.6%, with unemployment at 0.0%; those measures add context to the income figure. Home values sit below the statewide ZIP benchmark: the median is $209,200 (59% below the average Washington ZIP); owner occupancy is 94.7%.
Educational attainment sits below the national norm: 16.7% of adults hold a bachelor's degree or higher, the median age is 55.8, and the average commute is -. The page also surfaces 3 ZIP codes within roughly 10 miles and 6 more in Benton County, so 99346 can be compared with both its immediate and county-level context.
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 →
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 99346, Plymouth, 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
352
Population
320.0
Area (sq mi)
1
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 99346?
55.8
Median Age
66.7%
Male
33.3%
Female
20.2%
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?
$50,865
Median Household Income
-44% vs state ZIP avg
$28,424
Per Capita Income
8.6%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 99346 ranks among Washington ZIPs
Plymouth, 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)
$50,865 6th percentile higher than 6% 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
75housing units
75
Total Housing Units
75
Occupied Units
0
Vacant Units
2.29
Avg Household Size
Occupancy Type
$209,200
Median Home Value
-59% vs state ZIP avg
1998
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 7 business establishments in ZIP 99346, employing approximately 114 people with a combined annual payroll of $11,186,000.
7
Businesses
114
Employees
$11.2M
Annual Payroll
1
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Wholesale trade | 3 | 42.9% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 99346 vs 97882 →
ZIP 99346 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 97838
Hermiston (97838)
25,346 residents
- 99338
Kennewick (99338)
11,555 residents
- 97882 7,760
Umatilla (97882)
7,760 residents
- 99346 352
Plymouth (99346)
352 residents
What this shows Among its immediate neighbors, ZIP 99346 ranks #4 by population - useful context the national average alone can't give.
ZIP 99346 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 99338
Kennewick (99338)
$111,042 median income
- 97838
Hermiston (97838)
$69,599 median income
- 97882
Umatilla (97882)
$69,223 median income
- 99346
Plymouth (99346)
$50,865 median income
What this shows By household income, ZIP 99346 ranks #4 of 4 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 99346, 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 Benton County
Related Areas
Frequently Asked Questions
What county is ZIP code 99346 in?
ZIP code 99346 (Plymouth) is located in Benton County, Washington. Benton County contains multiple ZIP codes, see the full list at /counties/benton-wa.
What is the population of ZIP code 99346?
ZIP code 99346 in Plymouth, WA has a population of 352 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 99346?
The median household income in ZIP 99346 is $50,865, which is 33% below the national average of $76,288.
What is the average home value in ZIP 99346?
The median home value in ZIP 99346 is $209,200, which is 25% below the national average of $278,155.
What is the demographic makeup of ZIP 99346?
The largest racial group in ZIP 99346 is White at 65.7%. Hispanic or Latino residents make up 33.8% of the population.
How many businesses are in ZIP code 99346?
ZIP code 99346 has 7 business establishments employing approximately 114 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 99346?
In ZIP code 99346, 64.6% of residents aged 25+ have a high school diploma or higher, and 16.7% 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 99346?
In ZIP code 99346, approximately 94.7% of occupied housing units are owner-occupied and 5.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 99346?
The poverty rate in ZIP code 99346 is 8.6% 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 99346's numbers, next.
- See how ZIP 99346 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Plymouth, WA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.