People QuickFacts Johnston Iowa Population, 2012 estimate 18,728 3,074,186 Population, 2010 (April 1) estimates base 17,278 3,046,857 Population, percent change, April 1, 2010 to July 1, 2012 8.4% 0.9% Population, 2010 17,278 3,046,355 Persons under 5 years, percent, 2010 7.2% 6.6% Persons under 18 years, percent, 2010 29.9% 23.9% Persons 65 years and over, percent, 2010 9.9% 14.9% Female persons, percent, 2010 51.0% 50.5%  White persons, percent, 2010 (a) 91.0% 91.3% Black persons, percent, 2010 (a) 2.2% 2.9% American Indian and Alaska Native persons, percent, 2010 (a) 0.1% 0.4% Asian persons, percent, 2010 (a) 4.6% 1.7% Native Hawaiian and Other Pacific Islander, percent, 2010 (a) Z 0.1% Persons reporting two or more races, percent, 2010 1.5% 1.8% Persons of Hispanic or Latino origin, percent, 2010 (b) 2.0% 5.0% White persons not Hispanic, percent, 2010 89.6% 88.7%  Living in same house 1 year & over, percent, 2007-2011 81.5% 84.3% Foreign born persons, percent, 2007-2011 7.2% 4.2% Language other than English spoken at home, percent age 5+, 2007-2011 8.5% 7.0% High school graduate or higher, percent of persons age 25+, 2007-2011 97.0% 90.3% Bachelor's degree or higher, percent of persons age 25+, 2007-2011 51.4% 24.9% Veterans, 2007-2011 1,051 239,229 Mean travel time to work (minutes), workers age 16+, 2007-2011 17.4 18.6  Housing units, 2010 6,618 1,336,417 Homeownership rate, 2007-2011 79.3% 73.0% Housing units in multi-unit structures, percent, 2007-2011 15.0% 18.5% Median value of owner-occupied housing units, 2007-2011 $237,600 $121,300 Households, 2007-2011 5,843 1,219,137 Persons per household, 2007-2011 2.77 2.41 Per capita money income in the past 12 months (2011 dollars), 2007-2011 $39,371 $26,110 Median household income, 2007-2011 $93,042 $50,451 Persons below poverty level, percent, 2007-2011 5.3% 11.9%     Business QuickFacts Johnston Iowa Total number of firms, 2007 1,387 259,931 Black-owned firms, percent, 2007 F 0.8% American Indian- and Alaska Native-owned firms, percent, 2007 F 0.2% Asian-owned firms, percent, 2007 S 1.1% Native Hawaiian and Other Pacific Islander-owned firms, percent, 2007 F 0.1% Hispanic-owned firms, percent, 2007 F 0.9% Women-owned firms, percent, 2007 23.8% 25.5%  Manufacturers shipments, 2007 ($1000) NA 97,592,051 Merchant wholesaler sales, 2007 ($1000) 72,170 41,068,338 Retail sales, 2007 ($1000) 218,715 39,234,649 Retail sales per capita, 2007 $14,325 $13,172 Accommodation and food services sales, 2007 ($1000) 32,708 4,737,719     Geography QuickFacts Johnston Iowa Land area in square miles, 2010 17.16 55,857.13 Persons per square mile, 2010 1,007.0 54.5 FIPS Code 39765 19 Counties Polk 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