Mercer Island, WA Demographics

A map of Mercer Island's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	16,021	16,383	63.3%	63.6%
Asian	6,175	5,908	24.4%	22.9%
Multiracial	2,118	1,771	8.4%	6.9%
Hispanic	615	1,175	2.4%	4.6%
Black	216	275	0.9%	1.1%
Native American/Other	162	236	0.6%	0.9%

Mercer Island, Washington has an estimated population of 25,307, a slight decrease from the 25,748 recorded in the 2020 Census. The population is 63.3% White, 24.4% Asian, 8.4% Multiracial, 2.4% Hispanic, 0.9% Black, and 0.6% Native American/Other. This demographic dot map shows the population of Mercer Island, with one dot drawn for each person counted by the Census, color-coded by race.

Mercer Island is about as racially diverse as it was in the 2020 Census. It is less diverse than Washington overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Mercer Island, that probability was 53.5% in 2020 and 53.2% in the most recent ACS estimates.

Mercer Island is ranked the 52nd most populous place in Washington, out of 639 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Mercer Island was ranked the 48th most populous place in the 2020 Census.

Mercer Island's White Population

16,021 residents of Mercer Island, or 63.3% of the population, identify as White. The share of White residents in Mercer Island is comparable to the share in Washington overall, where 63.1% of the population is White. Mercer Island ranks 486th statewide in terms of White residents as a share of the population, out of 639 places.

Since the 2020 Census, Mercer Island's White population has declined by an estimated 2.2%. White residents' share of Mercer Island's population has remained roughly unchanged at 63.3%.

Mercer Island is more White than neighboring Medina (58% White), Clyde Hill (52.9% White), Bryn Mawr-Skyway (30.1% White), and Newcastle (37.6% White). Mercer Island is less White than neighboring Beaux Arts Village (78.1% White).

Mercer Island's Black Population

216 residents of Mercer Island, or 0.9% of the population, identify as Black. The share of Black residents in Mercer Island is slightly lower than in Washington overall, where 3.8% of the population is Black. Mercer Island ranks 204th statewide in terms of Black residents as a share of the population, out of 639 places.

Since the 2020 Census, Mercer Island's Black population has declined by an estimated 21.5%. Black residents' share of Mercer Island's population has remained roughly unchanged at 0.9%.

Mercer Island is more Black than neighboring Medina (0% Black), and Clyde Hill (0% Black). Mercer Island is less Black than neighboring Bryn Mawr-Skyway (22% Black), and Newcastle (3.5% Black).

Mercer Island's Asian Population

6,175 residents of Mercer Island, or 24.4% of the population, identify as Asian. The share of Asian residents in Mercer Island is considerably higher than in Washington overall, where 9.7% of the population is Asian. Mercer Island ranks 18th statewide in terms of Asian residents as a share of the population, out of 639 places.

Since the 2020 Census, Mercer Island's Asian population has grown by an estimated 4.5%. Asian residents' share of Mercer Island's population has increased from 22.9% to 24.4%.

Mercer Island is more Asian than neighboring Beaux Arts Village (10.3% Asian). Mercer Island is less Asian than neighboring Medina (28.8% Asian), Clyde Hill (34.2% Asian), Bryn Mawr-Skyway (28.4% Asian), and Newcastle (42.1% Asian).

Mercer Island's Hispanic Population

615 residents of Mercer Island, or 2.4% of the population, identify as Hispanic. The share of Hispanic residents in Mercer Island is considerably lower than in Washington overall, where 14.4% of the population is Hispanic. Mercer Island ranks 512th statewide in terms of Hispanic residents as a share of the population, out of 639 places.

Since the 2020 Census, Mercer Island's Hispanic population has declined by an estimated 47.7%. Hispanic residents' share of Mercer Island's population has decreased from 4.6% to 2.4%.

Mercer Island is more Hispanic than neighboring Beaux Arts Village (2.1% Hispanic), and Medina (0.3% Hispanic). Mercer Island is less Hispanic than neighboring Clyde Hill (4.1% Hispanic), Bryn Mawr-Skyway (9.5% Hispanic), and Newcastle (4.5% Hispanic).

Mercer Island's Native American/Other Population

162 residents of Mercer Island, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Mercer Island is comparable to the share in Washington overall, where 2.1% of the population is Native American/Other. Mercer Island ranks 540th statewide in terms of Native American/Other residents as a share of the population, out of 639 places.

Since the 2020 Census, Mercer Island's Native American/Other population has declined by an estimated 31.4%. Native American/Other residents' share of Mercer Island's population has remained roughly unchanged at 0.6%.

Mercer Island is more Native American/Other than neighboring Beaux Arts Village (0% Native American/Other), and Clyde Hill (0% Native American/Other). Mercer Island is less Native American/Other than neighboring Medina (0.8% Native American/Other), Bryn Mawr-Skyway (1.3% Native American/Other), and Newcastle (3% Native American/Other).

Mercer Island's Multiracial Population

2,118 residents of Mercer Island, or 8.4% of the population, identify as Multiracial. The share of Multiracial residents in Mercer Island is comparable to the share in Washington overall, where 6.8% of the population is Multiracial. Mercer Island ranks 236th statewide in terms of Multiracial residents as a share of the population, out of 639 places.

Since the 2020 Census, Mercer Island's Multiracial population has grown by an estimated 19.6%. Multiracial residents' share of Mercer Island's population has increased from 6.9% to 8.4%.

Mercer Island is less Multiracial than neighboring Beaux Arts Village (8.6% Multiracial), Medina (12.1% Multiracial), Clyde Hill (8.8% Multiracial), Bryn Mawr-Skyway (8.7% Multiracial), and Newcastle (9.3% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.