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CITY · 2000 CENSUS

Mercer Island

Washington · 22,036 residents · 6.383 sq mi
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The short version

Mercer Island is significantly wealthier than the US average, with a median household income of $91,904. Population has held roughly steady since 1990. 69% of adults hold a bachelor's degree or higher, well above the national rate of 24%. Median home value has risen by half since 1990, reaching $548,300. With a median age of 44.3, the population is older than the US median of 35.2. Households here earn about 101% more than the Washington median.

At a glance
Wealthier
above the US median
US median: $42,589
Older
median age 44.3
US median: 35.2
More educated
69% hold a bachelor's degree
US average: 24%
Less affordable
home values up 25%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

22,036
+6%since 1990
from 20,816 in 1990
1990 – 2025
3,452 / sq mi
+6%since 1990
from 3,261 / sq mi in 1990
US average: 242
44.3
+8%since 1990
from 41.0 in 1990
US average: 35.2
Population, 19902024
20K22K23K25K26K1990201020202024Mercer Island
202425K
1990201020202024
Section 02

Income & economy

$91,904
+13%inflation adjusted, since 1990
from $61,572 in 1990
US average: $42,589
1990 – 2024
$53,799
+71%since 1990
from $31,438 in 1990
US average: $21,522
3.2%
+0.9 ptssince 1990
from 2.3% in 1990
US average: 12.4%
Section 03

Housing

$548,300
+25%inflation adjusted, since 1990
from $332,500 in 1990
US average: $120,530
1990 – 2024
$1,014
+27%inflation adjusted, since 1990
from $607 in 1990
US average: $602
80.5%
+1.8 ptssince 1990
from 78.7% in 1990
19.5% rent
6.0
+10%since 1990
from 5.4 in 1990
1990 – 2024
RELATED:See current rent listings in Mercer Island on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic90.5%(18,848)
Black0.8%(163)
Hispanic / Latino1.3%(269)
Asian8%(1,674)
Diversity Score24.3%(5,057)
2000
White, non-Hispanic82.8%(18,249)
Black1.1%(250)
Hispanic / Latino1.9%(410)
Asian11.8%(2,607)
Diversity Score33.2%(7,312)
33
+37%since 1990
from 24 in 1990
1990 – 2024
Section 05

Education

69.1%
+8.8 ptssince 1990
from 60.3% in 1990
US average: 24.4%
High school or higher
97.7%
+1.0 ptssince 1990
from 96.8% in 1990
US average: 80.3%
31.6%
+7.6 ptssince 1990
from 24.0% in 1990
US average: 8.8%
Section 06

Commute & transportation

13.4 min
−46%since 1990
from 24.6 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

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Frequently asked

How many people live in Mercer Island, Washington?

Mercer Island, Washington has about 22,036 residents according to the 2000 Census.

What is the median household income in Mercer Island, Washington?

The typical household in Mercer Island, Washington earns about $91,904 a year. Half of households make more than that, and half make less.

Is Mercer Island, Washington expensive?

In Mercer Island, Washington, the median home is worth about $548,300, and the typical rent is about $1,014 a month.

How educated are people in Mercer Island, Washington?

About 69.1% of adults age 25 and over in Mercer Island, Washington hold a bachelor's degree or higher.

What is the poverty rate in Mercer Island, Washington?

About 3.2% of people in Mercer Island, Washington live below the federal poverty line.

Has Mercer Island, Washington grown since 1990?

Yes, Mercer Island, Washington has grown since 1990. The population has added about 1,220 residents, a change of about 6 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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