99403 ZIP Code, Clarkston, WA
99403 is a ZIP code in Clarkston, Washington — mostly in Asotin County (80% of its land), with smaller parts in Garfield County. It covers 143 square miles of land. The closest ZIP codes are 99402, 99179 and 99347. 20,760 people live here in 8,743 households. With about 145 people per square mile it is lightly settled, and most homes are owner-occupied (72%). Median household income is $71,482, below the Washington median of $98,141; the median age is 45.7, older than most ZIP codes.
Quick facts
- Mailing city: Clarkston, WA
- County: Asotin County
- Land area: 143 sq mi
- Population: 20,760
- Median household income: $71,482
Key figures
| Measure | Value |
|---|---|
| Residents | 20,760 |
| Households | 8,743 |
| Median household income | $71,482 |
| Income per person | $39,953 |
| Median age | 45.7 |
| Homeowners | 72.2% |
| Median home value | $325,300 |
| Median rent | $1,036 |
| Bachelor's degree or higher | 25.0% |
| Average commute (minutes) | 15 |
| Households with kids under 18 | 22.8% |
| Moved in the past year | 10.0% |
| Below the poverty line | 14.8% |
| Broadband internet | 87.1% |
| Speak a non-English language at home | 3.8% |
Household income
| % of households | Value |
|---|---|
| <$10K | 6.1% |
| $10–15K | 3.0% |
| $15–25K | 6.7% |
| $25–35K | 8.7% |
| $35–50K | 12.2% |
| $50–75K | 15.1% |
| $75–100K | 14.0% |
| $100–150K | 18.6% |
| $150–200K | 5.5% |
| $200K+ | 10.2% |
Age
| % of all residents | Value |
|---|---|
| <10 | 10.6% |
| 10–19 | 10.7% |
| 20–24 | 5.1% |
| 25–34 | 11.4% |
| 35–44 | 11.5% |
| 45–54 | 11.6% |
| 55–64 | 14.4% |
| 65–74 | 13.7% |
| 75+ | 10.9% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 38.6% |
| Owned outright | 29.9% |
| Rented | 25.8% |
| Vacant | 5.7% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 74.2% |
| Townhome | 1.4% |
| 2–4 units | 7.2% |
| 5–19 units | 2.9% |
| 20+ units | 2.8% |
| Mobile / other | 11.5% |
Businesses in 99403
413 business establishments with 5,262 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 66
- Construction: 53
- Retail Trade: 42
- Other Services (except Public Administration): 42
- Accommodation and Food Services: 40
- Professional, Scientific, and Technical Services: 31
- Finance and Insurance: 24
- Administrative and Support and Waste Management and Remediation Services: 21
EDDM carrier routes
See every USPS carrier route in 99403 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 99402 — Asotin city, WA (11.1 mi)
- 99179 — Uniontown town, WA (11.4 mi)
- 99347 — Pomeroy city, WA (13.9 mi)
- 99113 — Colton town, WA (15.1 mi)
- 83501 — Lewiston city, ID (19.4 mi)
- 99401 — Anatone CDP, WA (20 mi)
- 83832 — Genesee city, ID (21.9 mi)
- 83540 — Sweetwater CDP, ID (24.3 mi)
Areas that include 99403
- Clarkston Heights-Vineland, WA ZIP codes — 1 ZIP code
- Clarkston, WA ZIP codes — 1 ZIP code
- West Clarkston-Highland, WA ZIP codes — 1 ZIP code
- Asotin County ZIP codes — 3 ZIP codes
- Garfield County ZIP codes — 2 ZIP codes
- Washington ZIP code data
Mail every home in 99403
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 99403, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 99403 in?
- 99403 is a Clarkston, WA mailing address. By land area, 8% lies inside Clarkston Heights-Vineland, 2% lies inside West Clarkston-Highland and 1% lies inside Clarkston; the rest is outside any Census-defined city or community.
- What county is 99403 in?
- 99403 is mostly in Asotin County (80% of its land), with smaller parts in Garfield County.
- What is the population of 99403?
- About 20,760 people (±348), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 20,224.
- What is the median household income in 99403?
- $71,482 (±$6,394), compared with $98,141 for Washington as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 99403?
- EDDM2GO's stored route library does not include 99403 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 99403?
- The closest, measured center to center: 99402 (11.1 mi, Asotin), 99179 (11.4 mi, Uniontown), 99347 (13.9 mi, Pomeroy), 99113 (15.1 mi, Colton), 83501 (19.4 mi, Lewiston) and 99401 (20 mi, Anatone).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.