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Washington (WA)Pacific Time (PT)

Area Code 509

Washington (WA) * Spokane, Yakima, Kennewick, Richland, Addy, Airway Heights, Albion, Almira * Pacific Time (PT)

1.7M

Population

243

ZIP codes

Washington

Primary state

Pacific Time (PT)

Time zones

What stands out

  • Coverage: 1.7M people across 243 ZIP codes.
  • Major cities: Spokane, Yakima, Kennewick.
Primary state:Washington (WA)/Major cities:Spokane, Yakima, Kennewick, Richland, Addy, Airway Heights, Albion, Almira

Browse sections

Basics

Percentiles compare this area code to other area codes nationwide.

Population

1.7M

ZIP codes

243

Median age

37.4 yrs

Population density

42.8/sq mi

Mean commute time

22 min

Avg. household size

2.6

Neighbors

Neighboring area codes

208360425458503541564971986
Notes & Sources
  • Area-code boundaries can change over time; verify official assignments with NANPA for critical use.
  • This page aggregates ZIP-based crosswalks for orientation and does not indicate phone-number availability.

Data freshness

ACS 5-year
2020–2024
Page updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

U.S. Census (ACS 5-year)U.S. Census TIGER/LineNANPA

Derived statistics

  • Area codes are not Census geographies; statistics are estimated by aggregating ZCTA (ZIP) values for associated ZIPs.
  • ZIP↔area code associations are derived from NPA boundary polygons and ZCTA centroid points, and can be approximate.
  • Median age, mean commute, and household size are population-weighted; population density uses summed ZIP land area.
Area code overlays and service areas are primarily governed by NANPA; this page uses aggregated geographic overlays for orientation only.

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.