PlainZIP

Castle Rock, WA

Single-footprint Census roll-up for Castle Rock, WA: 1 USPS ZIP, population 9,133. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet CASTLE-ROCK-WA · Castle Rock, WA 1 ZIPs · 9,133 pop · #7328/25278 · Cowlitz County

INC-HIGH · RANK-UPPER · BELOW-PEER · BOOK-ONE · OWN-MID · POP-TOWN · SPREAD-UNK · HOME-HIGH

  • INC-HIGH $86,322
  • RANK-UPPER #7328/25278
  • BELOW-PEER under Woodland
  • BOOK-ONE 1 ZIP
  • OWN-MID 84% owners
  • POP-TOWN 9,133
  • SPREAD-UNK Single-ZIP book
  • HOME-HIGH $425,700

Nearest income peer: Woodland, WA (+ $7,923 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Castle Rock

Lowest/highest poles plus county-sharing cities nearest Castle Rock on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Castle Rock, WA sits among US cities with an above-median household income, on a town-scale population base, across a single-ZIP footprint.

Top 29%
household income vs 25,278 US cities
9,133
city population (Census)
1
USPS ZIP codes covered
$86,322
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

Above-median income on a short ZIP list (1) - lead code 98611 (9,133 residents). Household income $86,322 is the roll-up; open the ZIP for tenure and commute.

Owner-occupancy sits in a mixed band (83.8%) - check the ZIP page's tenure split before treating Castle Rock as a pure owner town.

Within Washington, Rockford is the closest lower-income city and Mount Vernon the closest higher-income city by average ZIP household income. Their 1 and 2 ZIP footprints are the immediate statewide comparison set for Castle Rock.

Population concentration

Castle Rock's single ZIP 98611 carries the town

Castle Rock is published as a single USPS ZIP. Code 98611 is the entire residential footprint (9,133 ACS residents), so the city page and the ZIP page tell the same household story, open that ZIP for income, tenure, and commute detail.

Census ZBP business roll-up

Mid-pack ZBP load on Castle Rock's one ZIP

Citywide ZBP: 160 establishments, 902 employees , annual payroll $38,709k (~18 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 98611 (160 units) ; leading NAICS Construction (32) · also Accommodation and food services · Retail trade .

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ZIP Codes in Castle Rock, WA

These ZIP codes sit in Cowlitz County, which covers 10 ZIP codes in all; 1 of them fall in Castle Rock. See the Cowlitz County roll-up →

Castle Rock lands mid-pack among the 8 cities sharing Cowlitz County: Woodland, Kalama and Silverlake earn more and Longview, Kelso and Ariel earn less. Ryderwood marks the far end of that range at $43,009, 50% below Castle Rock.

ZIP Code Population Median income Establishments Density
98611 9,133 $86,322 160 28
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Castle Rock roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Castle Rock, .