ZIP code 99170
Where is ZIP code 99170?
Rosalia, Washington
Whitman County · Standard ZIP code
ZIP code 99170 belongs to Rosalia, Washington in Whitman County. 99170 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Pacific Time zone and uses area code 509. About 926 people live in the 99170 area, where the median household income is $58,750. The closest ZIP codes are 99149 (Malden, 2.8 mi west), 99176 (Thornton, 6.8 mi south) and 99158 (Oakesdale, 10.3 mi southeast).
| ZIP code | 99170 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Rosalia |
| Also accepted | Plaza |
| State | Washington (WA) |
| County | Whitman County |
| Time zone | Pacific Time · now |
| Area code | 509 |
| Coordinates | 47.2218, -117.4147 map |
| 3-digit prefix | 991 |
Population and income in 99170
| Population | 926 · lower than 72% of Washington ZIP codes |
|---|---|
| People per square mile | 5 · lower than 86% of Washington ZIP codes |
| Median age | 50.5 years · higher than 76% of Washington ZIP codes |
| Men / women | 57% / 43% |
| Median household income | $58,750 · lower than 87% of Washington ZIP codes |
| Income per person | $35,231 |
| Below the poverty line | 12% |
| Bachelor’s degree or higher | 18% of adults 25+ |
| Median home value | $238,300 · lower than 91% of Washington ZIP codes |
| Median rent | $825 a month |
| Housing units | 487 |
| Households | 423 (2.19 people on average) |
| Owners / renters | 84% / 16% |
| Land area | 173.1 sq mi (plus 0.32 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 99170. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 99170
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 99149 | Malden, WA | 2.8 mi W | PO Box only |
| 99176 | Thornton, WA | 6.8 mi S | Standard |
| 99158 | Oakesdale, WA | 10.3 mi SE | Standard |
| 99039 | Waverly, WA | 12.1 mi NE | PO Box only |
| 99171 | Saint John, WA | 12.6 mi SW | Standard |
| 99018 | Latah, WA | 14 mi NE | Standard |
| 99031 | Spangle, WA | 14.7 mi N | Standard |
| 99104 | Belmont, WA | 14.9 mi SE | Standard |
| 99174 | Steptoe, WA | 15.2 mi S | PO Box only |
| 99033 | Tekoa, WA | 15.6 mi E | Standard |
| 99012 | Fairfield, WA | 16.1 mi NE | Standard |
| 99128 | Farmington, WA | 18.5 mi SE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 99170 or measure the distance to another ZIP code.
How to address mail to 99170
123 MAIN ST
ROSALIA WA 99170
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts PLAZA as the city name for 99170. Adding the 4-digit ZIP+4 code (99170-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 99170?
- 99170 is a Rosalia, Washington ZIP code. Plaza is also accepted as the city name.
- What county is 99170 in?
- ZIP code 99170 is in Whitman County, Washington.
- What time zone is ZIP code 99170 in?
- 99170 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 99170?
- Phone numbers in ZIP code 99170 use area code 509.
- What is the population of ZIP code 99170?
- About 926 people live in ZIP code 99170, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 99170?
- The median household income in 99170 is $58,750 a year, lower than 87% of Washington ZIP codes.
- What ZIP codes are near 99170?
- The nearest ZIP codes to 99170 are 99149 (Malden, 2.8 miles), 99176 (Thornton, 6.8 miles), 99158 (Oakesdale, 10.3 miles) and 99039 (Waverly, 12.1 miles).