Rock Island, Washington

Rock Island population, 2020 to 2024

Rock Island added 433 residents from July 2020 to July 2024, a change of +33.6%. In the latest year it moved by +98.

Rock Island covers 1.13 square miles of land and 0.27 of water, for 1,524 people per square mile of land. The median Washington place of 5,000+ has 2,694, so Rock Island is less dense than the typical town.

What county Rock Island is in

All of Rock Island's residents live in Douglas County, which had 45,795 residents in 2024. Rock Island holds 3.8% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Rock Island

1 ZIP Code Tabulation Area (ZCTA) overlaps Rock Island by at least 10% of the ZCTA's or the city's land: 98850. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Rock Island is

The Census internal point of Rock Island is at 47.373200, -120.142100. Olympia, the capital, is 131.5 miles W in a straight line. The nearest larger place is East Wenatchee, WA (14,330 people), 7.3 miles away. The nearest city of 100,000 or more is Bellevue, WA, 95.3 miles away.

Daylight in Rock Island

At 47.37° N, Rock Island gets about 15 h 57 min of daylight around the June solstice and 8 h 27 min around the December solstice, a swing of 7 h 30 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Rock Island

The eight nearest incorporated places of 1,000+ in Washington, measured between internal points. The closest is East Wenatchee, 7.3 miles away, with 14,330 people.