Union Gap is a city in Yakima County, Washington, home to about 6,584 people across 5.6 square miles. It has no ZIP code of its own: it’s part of 98903.
Homes sold for a median of $269 per square foot in the three months ending August 2026, a seller’s market.
Mostly Yakima; part is in Union Gap
Each card is that ZIP code’s whole market, including any part outside Union Gap. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Union Gap’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Seattle–Tacoma International Airport (SEA)97 miles away |
|---|---|
| Closer regional airport | Yakima Air Terminal McAllister Field (YKM)10 miles away |
| Nearest city of 250,000+ | Seattle, WA106 miles away |
Straight-line distances from the center of Union Gap; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Union Gap had 6,568 residents in the 2020 census, up 17% since 2000.
It’s the 169th largest of 628 towns in Washington by population.
Yakima County grew from 13,462 residents in 1900 to 256,728 in 2020.
Yakima County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 26°F. About 8.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Yakima #2, WA weather station (9 miles away).
71,390 jobs at 5,010 businesses in Yakima County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
97 doctors and other health care providers list an office in Union Gap.
Nearest hospitals
Providers with an office here
| Primary care doctors | 5 |
|---|---|
| Specialist doctors | 4 |
| Dentists | 8 |
| Nurse practitioners and physician assistants | 13 |
| Mental health providers | 61 |
| Physical and occupational therapists | 1 |
| Optometrists | 4 |
| Chiropractors | 1 |
| Pharmacies | 6 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Counts are within about 2 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Union Gap School District, West Valley School District (Yakima), Yakima School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Union Gap SchoolUnion Gap | Pre-K–8 | 558 | Public | 12.6 mi |
| West Valley PreschoolYakima | Pre-K | 56 | Special Education | 4.5 mi |
| Martin Luther King Jr ElementaryYakima | K–5 | 485 | Public | 12.8 mi |
| Ridgeview ElementaryYakima | K–5 | 533 | Public | 11.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| La Salle High SchoolUnion Gap | 9–12 | 203 | Roman Catholic | 11.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Yakima, Ahtanum and Tampico.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.