Делавер (округ, Айова): відмінності між версіями

| estref = <ref name="USCensusEst2018">{{cite web|url=https://www.census.gov/programs-surveys/popest/data/tables.2018.html|title=Population and Housing Unit Estimates|accessdate=22 червня 2019|archive-date=29 травня 2017|archive-url=https://web.archive.org/web/20170529192346/https://census.gov/programs-surveys/popest/data/tables.2016.html}}</ref>

| footnote = U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/prod/www/decennial.html|title=U.S. Decennial Census|publisher=United States Census Bureau|accessdate=16 липня 2014|url-status=dead|archiveurl=https://web.archive.org/web/20150426102944/http://www.census.gov/prod/www/decennial.html|archivedate=April 26, 2015}}</ref><br />1790-1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|accessdate=16 липня 2014|archive-date=11 серпня 2012|archive-url=https://web.archive.org/web/20120811110448/http://mapserver.lib.virginia.edu/}}</ref> 1900-1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/ia190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|accessdate=16 липня 2014|archive-date=22 квітня 2014|archive-url=https://web.archive.org/web/20140422035351/http://www.census.gov/population/cencounts/ia190090.txt}}</ref><br />1990-2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|accessdate=16 липня 2014|archive-date=18 грудня 2014|archive-url=https://web.archive.org/web/20141218203824/http://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf}}</ref> 2010-2018<ref name="QF"/>