| 2026-08-19 | Part of the Corn Belt |
| 2026-07-02 | Setting of "What's Eating Gilbert Grape" |
| 2026-04-24 | Where the Red Delicious apple originated |
| 2026-03-08 | Caitlin Clark's alma mater |
| 2026-01-14 | Where Caitlin Clark played Division I basketball |
| 2025-12-16 | The Hawkeye State |
| 2025-12-07 | Future birthplace of Captain Kirk |
| 2025-11-08 | Where Caitlin Clark played college hoops |
| 2025-04-29 | Midwest tribe |
| 2024-06-19 | Where Captain Kirk was born and raised |
| 2023-12-28 | Where more pigs live than people |
| 2023-12-25 | 57-Down's state |
| 2023-11-27 | Des Moines's home |
| 2023-09-14 | Early voting site |
| 2023-09-12 | Corn Belt state |
| 2023-07-28 | Midwest tribe |
| 2023-07-27 | Locale of the house depicted in "American Gothic" |
| 2023-07-24 | Where Des Moines is |
| 2023-03-10 | It has a higher population of pigs than people |
| 2023-02-02 | Big Ten school |
| 2023-01-07 | "I thought of a joke about ___, but it's too corny" (groaner) |
| 2022-05-26 | "The Music Man" locale |
| 2021-11-10 | Johnny Carson's home state |
| 2021-11-01 | Hawkeye State |
| 2021-10-05 | State generating the highest percentage of its electricity by wind |
| 2021-06-17 | Top pork producer in the U.S. |
| 2021-05-03 | Its state fair is much visited by politicians |
| 2021-03-07 | ___ Writers' Workshop |
| 2021-02-24 | Its state seal shows a steamboat on the Mississippi |
| 2021-02-21 | Geographical name that comes from the Sioux for "sleepy ones" |
| 2021-02-03 | Only state with a two-vowel postal code |
| 2020-04-07 | Early stop for presidential candidates |
| 2020-02-06 | John Wayne Birthplace Museum locale |
| 2019-09-09 | Des Moines's state |
| 2019-08-31 | Locale of Drake University |
| 2019-08-09 | Midwest tribe |
| 2019-05-07 | Hawkeye's home |
| 2019-04-27 | Big Ten school |
| 2019-02-11 | Where the first presidential caucuses are held |
| 2018-12-30 | Waterloo's home |
| 2018-12-17 | Sioux City's state |
| 2017-10-01 | Locale for two of the Quad Cities |
| 2017-08-17 | Its motto is "Our liberties we prize and our rights we will maintain" |
| 2017-02-23 | Where Herbert Hoover was born |
| 2017-02-14 | Des Moines's home |
| 2017-02-07 | Site of the first-in-the-nation caucuses |
| 2017-01-09 | State that produces the most corn |
| 2016-09-13 | Davenport's home |
| 2016-06-20 | Where the presidential primary season kicks off |
| 2016-05-26 | Its eastern and western borders are formed entirely by rivers |
| 2016-05-08 | Setting for "The Music Man" |
| 2016-02-21 | "The Bridges of Madison County" setting |
| 2016-02-10 | Caucus locale |
| 2015-07-16 | River flowing SE to the Mississippi |
| 2015-06-04 | Name repeated in ___ City, ___ |
| 2015-02-04 | Word repeated in ___ City, ___ |
| 2014-09-18 | One of 14 in the Big Ten |
| 2014-08-28 | Los Angeles's U.S.S. ___ Museum |
| 2014-08-10 | Place to caucus |
| 2013-08-23 | Locale for many political debates |
| 2013-07-17 | Caucus state |
| 2013-04-18 | U.S.S. ___ (W.W. II battleship) |
| 2013-02-18 | Dubuque's state |
| 2012-10-15 | Des Moines's state |
| 2012-05-08 | Early stop in a presidential race |
| 2011-12-25 | W.W. II battleship |
| 2011-06-08 | Herbert Hoover's home state |
| 2011-05-04 | Home of Fort Dodge |
| 2011-04-29 | Where I-80 crosses I-35 |
| 2010-06-30 | Early caucus state |
| 2010-06-10 | Big Ten team |
| 2010-02-03 | Where James T. Kirk was born and raised |
| 2010-01-31 | "The Bridges of Madison County" setting |
| 2010-01-25 | Early state in presidential campaigns |
| 2009-05-26 | Home of the Hawkeyes of the Big Ten |
| 2009-04-05 | The Big Sioux River forms part of its border |
| 2009-02-10 | Sioux City's locale |
| 2008-12-18 | Home of Private Ryan in "Saving Private Ryan" |
| 2008-12-02 | Place name before and after City |
| 2008-03-19 | Hawkeye's home |
| 2008-02-18 | Early state in the presidential campaign |
| 2007-10-16 | Political caucus state |
| 2007-10-14 | A Siouan |
| 2007-08-29 | Corn Belt state |
| 2007-06-26 | The Hawkeyes of college sports |
| 2006-12-03 | Big source of corn |
| 2006-11-23 | For Minnesotans, it's south of the border |
| 2006-09-19 | Corn Belt state |
| 2006-06-02 | Straw poll setting |
| 2006-03-14 | The Hawkeyes of the Big Ten |
| 2004-11-17 | Davenport site |
| 2004-07-08 | Home of Pottawattamie County |
| 2004-04-30 | Skunk River locale |
| 2003-09-30 | Part of the Corn Belt |
| 2003-03-18 | Corn Belt state |
| 2002-11-28 | Waterloo's place |
| 2002-10-30 | Ottumwa's locale |
| 2002-08-05 | Dubuque's state |
| 2002-06-11 | Keokuk's home |
| 2002-05-01 | "The Music Man" setting |
| 2001-12-25 | Part of the Corn Belt |
| 2001-12-13 | Raccoon River locale |
| 2001-10-04 | Waterloo locale |
| 2001-03-21 | See 6-Down |
| 2001-01-16 | Hawkeye's home |
| 2001-01-14 | "Field of Dreams" setting |
| 2000-08-22 | Where Red Delicious apples originated |
| 2000-07-12 | Caucus state |
| 2000-04-24 | The Hawkeye State |
| 2000-02-21 | Early political caucus state |
| 2000-01-20 | Hawkeyes' home |
| 1999-11-08 | Part of the Corn Belt |
| 1999-08-04 | Big Ten school |
| 1999-06-18 | Where Buffalo Bill was born |
| 1999-04-25 | Corn locale |
| 1999-02-22 | Des Moines is its capital |
| 1998-07-06 | Presidential caucus state |
| 1998-06-20 | Part of the Corn Belt |
| 1998-05-25 | Hawkeye State |
| 1997-07-27 | "Field of Dreams" setting |
| 1996-11-20 | "State Fair" state |
| 1996-09-09 | Where Ames is |
| 1996-07-15 | The Hawkeye State |
| 1995-11-23 | "The Music Man" locale |
| 1995-06-25 | "Bridges of Madison County" setting |
| 1994-11-18 | "The Bridges of Madison County" locale |
| 1994-11-07 | Hawkeye State |