98040 Frequently Asked Questions

A: ZIP Code 98040 is Located in Mercer Island Washington.

A: ZIP Code 98040 is Located Entirely in King County Washington.

A: The Current Sales Tax in ZIP Code 98040 is 10.1%

A: The Area Code for 98040 is 206.

A: ZIP Code 98040 is in the Washington 9th Congressional District.

A: ZIP Code 98040 is in Washington State House of Representatives District 41.

A: ZIP Code 98040 is in Washington State Senate District 41.

A: The 2022 population of ZIP Code 98040 is 25464. The population growth rate in 98040 is 2.98%. The population density of 98040 is 1,941.

A: The majority race/ethnicity of people residing in 98040 is White (72.63%). The majority race/ethnicity of students attending public schools in 98040 is White(57.56%).

A: The median household income in 98040 is $170,000 (2021) and the average adjusted income is $1,267,090 (2021).