Franklin County, WA ZIP Codes
7 ZIP codes cover all or part of Franklin County, Washington: 99301, 99344, 99326, 99343, 99330, 99371 and 99335. The Census Bureau counts 98,902 residents in the county, with a median household income of $86,714 and a median home value of $379,300. Median household income ranges from $59,451 in 99343 to $140,093 in 99330. Its largest communities include Pasco, Connell, Basin City, West Pasco and Mesa.
Franklin County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 98,902 |
| Households | 29,890 |
| Median household income | $86,714 |
| Median home value | $379,300 |
| Median age | 30.9 |
| Median rent | $1,198 |
All 7 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 117,962 |
| Households (sum of ZIP codes) | 35,250 |
| Median household income, range across ZIP codes | $59,451 (99343) to $140,093 (99330) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $83,874 |
| Homeowners | 70.3% |
| Households with kids under 18 | 47.8% |
| Moved in the past year | 11.2% |
| Carrier routes in EDDM2GO's route library | 12 routes, 6,560 homes (3 of 7 ZIP codes) |
Top facts
- Highest median household income in Franklin County: 99330 ($140,093)
- Most residents: 99301 (87,044 people)
- Highest homeownership: 99330 (93.3% own their home)
- Most households with kids: 99330 (70.6% of households)
- Most new movers: 99326 (18.8% moved in last year)
- Youngest median age: 99343 (24.0 years)
- Highest median home value: 99330 ($554,200)
Every ZIP code in Franklin County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 99301 | Pasco | 87,044 | 27,093 | $87,951 | $385,500 | 71.4% | 47.6% | 11.9% | — | — | 100% of its land |
| 99344 | Othello | 19,534 | 5,422 | $64,888 | $281,900 | 65.9% | 49.6% | 5.9% | 10 | 6,328 | 16% of its land |
| 99326 | Connell | 6,336 | 1,438 | $82,500 | $320,800 | 64.7% | 47.4% | 18.8% | 1 | 235 | 88% of its land |
| 99343 | Mesa | 3,215 | 807 | $59,451 | $253,000 | 65.3% | 41.4% | 14.0% | — | — | 100% of its land |
| 99330 | Eltopia | 1,210 | 252 | $140,093 | $554,200 | 93.3% | 70.6% | 3.1% | 1 | 328 | 100% of its land |
| 99371 | Washtucna | 394 | 150 | $77,500 | $217,500 | 76.7% | 27.3% | 11.9% | — | — | 21% of its land |
| 99335 | Kahlotus | 229 | 88 | $91,667 | $250,000 | 72.7% | 26.1% | 1.7% | — | — | 100% of its land |
A ZIP code is listed for Franklin County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Pasco — 79,575 residents · 1 ZIP code
- Connell — 5,054 residents · 1 ZIP code
- Basin City — 1,176 residents · 1 ZIP code
- West Pasco — 1,122 residents · 1 ZIP code
- Mesa — 502 residents · 1 ZIP code
- Hatton — 429 residents · 2 ZIP codes
- Kahlotus — 124 residents · 1 ZIP code
Rankings
- Richest ZIP codes in Franklin County — 5 ZIP codes ranked
- ZIP codes with the highest home values in Franklin County — 5 ZIP codes ranked
- ZIP codes with the highest homeownership in Franklin County — 5 ZIP codes ranked
- ZIP codes with the most families with kids in Franklin County — 5 ZIP codes ranked
- ZIP codes with the most new movers in Franklin County — 5 ZIP codes ranked
- Youngest ZIP codes in Franklin County — 5 ZIP codes ranked
- Oldest ZIP codes in Franklin County — 5 ZIP codes ranked
- Fastest-growing ZIP codes in Franklin County — 5 ZIP codes ranked
Price a mailing to Franklin County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Franklin County, WA?
- 99301, 99344, 99326, 99343, 99330, 99371 and 99335. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Franklin County?
- 98,902 residents in 29,890 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Franklin County?
- $86,714 for the county as a whole. Its ZIP codes range from $59,451 (99343) to $140,093 (99330).
- Which Franklin County ZIP code has the highest median household income?
- 99330, at $140,093, among ZIP codes with at least 1,000 residents. See the full ranking of Franklin County ZIP codes by income.
- How many carrier routes and mailboxes are in Franklin County?
- For the 3 of 7 ZIP codes in EDDM2GO's stored route library: 12 carrier routes reaching 6,560 residential and 329 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.