People QuickFacts Mercer Island Washington Population, 2011 estimate 23,154 6,823,267 Population, 2010 (April 1) estimates base 22,699 6,724,543 Population, percent change, April 1, 2010 to July 1, 2011 2.0% 1.5% Population, 2010 22,699 6,724,540 Persons under 5 years, percent, 2010 4.4% 6.5% Persons under 18 years, percent, 2010 24.6% 23.5% Persons 65 years and over, percent, 2010 19.5% 12.3% Female persons, percent, 2010 51.3% 50.2%  White persons, percent, 2010 (a) 77.9% 77.3% Black persons, percent, 2010 (a) 1.3% 3.6% American Indian and Alaska Native persons, percent, 2010 (a) 0.2% 1.5% Asian persons, percent, 2010 (a) 15.9% 7.2% Native Hawaiian and Other Pacific Islander, percent, 2010 (a) 0.1% 0.6% Persons reporting two or more races, percent, 2010 3.9% 4.7% Persons of Hispanic or Latino origin, percent, 2010 (b) 2.8% 11.2% White persons not Hispanic, percent, 2010 76.0% 72.5%  Living in same house 1 year & over, percent, 2007-2011 89.4% 82.3% Foreign born persons, percent, 2007-2011 17.3% 12.8% Language other than English spoken at home, percent age 5+, 2007-2011 19.0% 17.8% High school graduate or higher, percent of persons age 25+, 2007-2011 98.4% 89.8% Bachelor's degree or higher, percent of persons age 25+, 2007-2011 74.7% 31.4% Veterans, 2007-2011 1,730 601,507 Mean travel time to work (minutes), workers age 16+, 2007-2011 20.9 25.5  Housing units, 2010 9,930 2,885,677 Homeownership rate, 2007-2011 74.8% 64.4% Housing units in multi-unit structures, percent, 2007-2011 26.0% 25.7% Median value of owner-occupied housing units, 2007-2011 $893,700 $283,200 Households, 2007-2011 9,253 2,602,568 Persons per household, 2007-2011 2.42 2.50 Per capita money income in the past 12 months (2011 dollars), 2007-2011 $76,619 $30,481 Median household income, 2007-2011 $123,328 $58,890 Persons below poverty level, percent, 2007-2011 2.7% 12.5%     Business QuickFacts Mercer Island Washington Total number of firms, 2007 2,908 551,340 Black-owned firms, percent, 2007 S S American Indian- and Alaska Native-owned firms, percent, 2007 F 1.2% Asian-owned firms, percent, 2007 S 6.8% Native Hawaiian and Other Pacific Islander-owned firms, percent, 2007 F 0.2% Hispanic-owned firms, percent, 2007 S 3.2% Women-owned firms, percent, 2007 23.0% 28.7%  Manufacturers shipments, 2007 ($1000) NA 112,053,283 Merchant wholesaler sales, 2007 ($1000) 150,597 76,790,966 Retail sales, 2007 ($1000) 101,935 92,968,519 Retail sales per capita, 2007 $4,285 $14,380 Accommodation and food services sales, 2007 ($1000) 23,251 12,389,422     Geography QuickFacts Mercer Island Washington Land area in square miles, 2010 6.32 66,455.52 Persons per square mile, 2010 3,591.0 101.2 FIPS Code 45005 53 Counties King County (a) Includes persons reporting only one race. (b) Hispanics may be of any race, so also are included in applicable race categories. FN: Footnote on this item for this area in place of data NA: Not available D: Suppressed to avoid disclosure of confidential information X: Not applicable S: Suppressed; does not meet publication standards Z: Value greater than zero but less than half unit of measure shown F: Fewer than 100 firms Source: US Census Bureau State & County QuickFacts