Sammamish, Washington

Sammamish population, 2020 to 2024

Sammamish lost 975 residents from July 2020 to July 2024, a change of -1.4%. In the latest year it moved by +617. Among 125 Washington places of 5,000 or more, that growth ranks 112th; the median place changed by +2.6%. The median place of 5,000+ in Washington has 18,148 people, so Sammamish is 3.7 times that size.

Sammamish covers 20.43 square miles of land and 3.61 of water, for 3,254 people per square mile of land. The median Washington place of 5,000+ has 2,694, so Sammamish is denser than the typical town.

What county Sammamish is in

All of Sammamish's residents live in King County, which had 2,340,211 residents in 2024. Sammamish holds 2.8% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Sammamish

3 ZIP Code Tabulation Areas (ZCTAs) overlap Sammamish by at least 10% of the ZCTA's or the city's land: 98029, 98074, 98075. 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 Sammamish is

The Census internal point of Sammamish is at 47.594300, -122.038100. Olympia, the capital, is 55.8 miles SW in a straight line. The nearest larger place is Bellevue, WA (154,377 people), 5.5 miles away.

Daylight in Sammamish

At 47.59° N, Sammamish gets about 15 h 59 min of daylight around the June solstice and 8 h 26 min around the December solstice, a swing of 7 h 34 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Sammamish

The eight nearest incorporated places of 1,000+ in Washington, measured between internal points. The closest is Issaquah, 3.5 miles away, with 39,664 people.