| September 17, 2006 | Iowa Speedway, Newton, IA | USAC Silver Crown | Dave Steele | |
| October 15, 2006 | Prairie Meadows 250 | Iowa Speedway, Newton, IA | ARCA Stock Car | Steven Wallace |
| May 5, 2007 | Casey's General Store USAC Triple Crown | Iowa Speedway, Newton, IA | USAC Silver Crown | Bobby East |
| May 20, 2007 | Featherlite Coaches 200 | Iowa Speedway, Newton, IA | NASCAR West/Busch East | Joey Logano |
| June 2, 2007 | Prairie Meadows 250 | Iowa Speedway, Newton, IA | ARCA Stock Car | Frank Kimmel |
| June 23, 2007 | Iowa 100 | Iowa Speedway, Newton, IA | IRL Indy Pro Series | Alex Lloyd |
| June 24, 2007 | Iowa Corn Indy 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Dario Franchitti |
| July 13, 2007 | Iowa Speedway, Newton, IA | Grand Am Rolex Sports Car Series | Guillermo Rojas Jr. Scott Pruett | |
| July 14, 2007 | Iowa Speedway, Newton, IA | Grand Am Rolex Sports Car Series | R.J. Valentine Andy Lally | |
| April 19, 2008 | Prairie Meadows 250 | Iowa Speedway, Newton, IA | ARCA Stock Car | Matt Hawkins |
| May 18, 2008 | U.S. Cellular 200 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Brian Ickler |
| June 21, 2008 | Jeld-Wen 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Dillon Battistini |
| June 22, 2008 | Iowa Corn Indy 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Dan Wheldon |
| August 10, 2008 | Casey's General Stores 100 | Iowa Speedway, Newton, IA | USAC Silver Crown | Cameron Dodson |
| May 17, 2009 | Long John Silver's 200 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Kyle Busch |
| June 19, 2009 | Iowa Speedway, Newton, IA | USAC Midget | Bobby Santos III | |
| June 20, 2009 | Miller Lite 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Ana Beatriz Caselato Gomes de Figueiredo |
| June 21, 2009 | Iowa Corn Indy 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Dario Franchitti |
| July 11, 2009 | Prairie Meadows 200 | Iowa Speedway, Newton, IA | ARCA Stock Car | Parker Kligerman |
| July 31, 2009 | Casey's General Stores Challenge | Iowa Speedway, Newton, IA | USAC Sprint Car | Shane Hmiel |
| July 31, 2009 | Casey's General Stores Challenge | Iowa Speedway, Newton, IA | USAC Silver Crown | Cameron Dodson |
| August 1, 2009 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Brad Keselowski |
| September 4, 2009 | Central Iowa Building & Construction Trades 125 | Iowa Speedway, Newton, IA | NASCAR West Series | David Mayhew |
| September 5, 2009 | Lucas Oil 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Mike Skinner |
| May 22, 2010 | Iowa Speedway, Newton, IA | USAC Sprint Car | Bryan Clauson | |
| May 22, 2010 | Iowa Speedway, Newton, IA | USAC Midget | Bobby Santos III | |
| May 22, 2010 | Iowa Speedway, Newton, IA | USAC Silver Crown | A.J. Fike | |
| May 23, 2010 | Goodyear Dealers of Iowa 200 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Max Gresham |
| June 19, 2010 | Iowa Speedway, Newton, IA | IRL USF2000 | Sage Karam | |
| June 19, 2010 | AvoidTheStork.com 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Sebastián Saavedra |
| June 20, 2010 | Iowa Corn Indy 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Antoine Rizkallah Kanaan Jr. |
| July 10, 2010 | Prairie Meadows 200 | Iowa Speedway, Newton, IA | ARCA Stock Car | Tom Hessert III |
| July 11, 2010 | Lucas Oil 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Austin Dillon |
| July 31, 2010 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Kyle Busch |
| May 21, 2011 | Pork 'Be Inspired' 175 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Brett Moffitt |
| May 22, 2011 | Iowa John Deere Dealers 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Ricky Stenhouse Jr. |
| June 24, 2011 | Iowa Speedway, Newton, IA | USAC Silver Crown | Bobby East | |
| June 24, 2011 | Iowa Speedway, Newton, IA | USAC Midget | Caleb Armstrong | |
| June 25, 2011 | Iowa Corn Indy 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Marco Andretti |
| June 25, 2011 | Sukup 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Josef Newgarden |
| June 25, 2011 | Iowa Speedway, Newton, IA | IRL Star Mazda | Sage Karam | |
| July 16, 2011 | Prairie Meadows 200 | Iowa Speedway, Newton, IA | ARCA Stock Car | Ty Dillon |
| July 16, 2011 | Coca Cola 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Matt Crafton |
| August 6, 2011 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Ricky Stenhouse Jr. |
| May 19, 2012 | Graham Tire 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Chase Elliott |
| May 20, 2012 | Pioneer Hi-Bred 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Ricky Stenhouse Jr. |
| June 22, 2012 | Casey's General Stores USAC Challenge | Iowa Speedway, Newton, IA | USAC Silver Crown | Bobby East |
| June 22, 2012 | Qualifying Race #1 | Iowa Speedway, Newton, IA | IRL Indy Car | Graham Rahal |
| June 22, 2012 | Qualifying Race #2 | Iowa Speedway, Newton, IA | IRL Indy Car | Antoine Rizkallah Kanaan Jr. |
| June 22, 2012 | Qualifying Race #3 | Iowa Speedway, Newton, IA | IRL Indy Car | Dario Franchitti |
| June 22, 2012 | Casey's General Stores USAC Challenge | Iowa Speedway, Newton, IA | USAC Midget | Bobby Santos III |
| June 23, 2012 | Iowa Corn Indy 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Ryan Hunter-Reay |
| June 23, 2012 | Sukup 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Esteban Guerrieri |
| June 23, 2012 | Iowa Speedway Foundation 100 | Iowa Speedway, Newton, IA | IRL Star Mazda | Sage Karam |
| July 13, 2012 | Prairie Meadows 200 | Iowa Speedway, Newton, IA | ARCA Stock Car | Alex Bowman |
| July 14, 2012 | American Ethanol 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Timothy Peters |
| August 3, 2012 | Pork Be Inspired 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Corey LaJoie |
| August 4, 2012 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Elliott Sadler |
| September 15, 2012 | American Ethanol 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Ryan Blaney |
| June 7, 2013 | Casey's General Stores 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Michael Self |
| June 9, 2013 | DuPont Pioneer 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Trevor Bayne |
| June 22, 2013 | Qualifying Race #1 | Iowa Speedway, Newton, IA | IRL Indy Car | Scott Dixon |
| June 22, 2013 | Qualifying Race #2 | Iowa Speedway, Newton, IA | IRL Indy Car | Graham Rahal |
| June 22, 2013 | Qualifying Race #3 | Iowa Speedway, Newton, IA | IRL Indy Car | Hélio Alves de Castroneves |
| June 22, 2013 | Sukup 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Sage Karam |
| June 23, 2013 | Iowa Corn Indy 250 | Iowa Speedway, Newton, IA | IRL Indy Car | James Hinchcliffe |
| July 13, 2013 | American Ethanol 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Timothy Peters |
| August 2, 2013 | Pork Be Inspired 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Cole Custer |
| August 3, 2013 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Brad Keselowski |
| September 7, 2013 | Prairie Meadows 150 | Iowa Speedway, Newton, IA | ARCA Stock Car | Grant Enfinger |
| September 8, 2013 | Fan Appreciation 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | James Buescher |
| May 17, 2014 | Casey's General Store 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Ben Rhodes |
| May 18, 2014 | Get to Know Newton 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Sam Hornish |
| July 11, 2014 | American Ethanol 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Erik Jones |
| July 12, 2014 | Iowa Corn Indy 300 | Iowa Speedway, Newton, IA | IRL Indy Car | Ryan Hunter-Reay |
| August 1, 2014 | Autolite Iridium XP 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Brandon Jones |
| August 2, 2014 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Nationwide Series | Brad Keselowski |
| May 16, 2015 | Casey's General Store 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Brandon McReynolds |
| May 17, 2015 | 3M 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Chris Buescher |
| June 19, 2015 | American Ethanol 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Erik Jones |
| June 20, 2015 | Iowa Speedway, Newton, IA | USAC Silver Crown | Bobby Santos III | |
| July 17, 2015 | #ThisIsMySpeedway 150 | Iowa Speedway, Newton, IA | ARCA Stock Car | Mason Mitchell |
| July 18, 2015 | Iowa 115 | Iowa Speedway, Newton, IA | IRL Indy Lights | Max Chilton |
| July 18, 2015 | Iowa Speedway, Newton, IA | IRL Pro Mazda | Weiron Tan 陈 韦龙 | |
| July 18, 2015 | Iowa Corn 300 | Iowa Speedway, Newton, IA | IRL Indy Car | Ryan Hunter-Reay |
| July 31, 2015 | Thanks Kenny 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Brandon McReynolds |
| August 1, 2015 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Ryan Blaney |
| June 18, 2016 | Speediatrics 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | William Byron |
| June 19, 2016 | American Ethanol E15 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Sam Hornish |
| July 9, 2016 | ABC Supply 150 | Iowa Speedway, Newton, IA | ARCA Stock Car | Chase Briscoe |
| July 10, 2016 | Iowa Corn 300 | Iowa Speedway, Newton, IA | IRL Indy Car | Josef Newgarden |
| July 10, 2016 | Iowa Challenge | Iowa Speedway, Newton, IA | IRL Indy Lights | Félix Serrallés |
| July 29, 2016 | Casey's General Store 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Todd Gilliland |
| July 30, 2016 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Erik Jones |
| June 23, 2017 | M&Ms 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | John Hunter Nemechek |
| June 24, 2017 | American Ethanol E15 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | William Byron |
| July 8, 2017 | Fans With Benefits 150 | Iowa Speedway, Newton, IA | ARCA Stock Car | Dalton Sargeant |
| July 9, 2017 | Iowa Corn 300 | Iowa Speedway, Newton, IA | IRL Indy Car | Hélio Alves de Castroneves |
| July 9, 2017 | Iowa 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Matheus Leist |
| July 9, 2017 | Iowa Speedway, Newton, IA | IRL USF2000 | Oliver Askew | |
| July 28, 2017 | Casey's General Store 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Todd Gilliland |
| July 29, 2017 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Ryan Preece |
| June 16, 2018 | M&Ms 200 | Iowa Speedway, Newton, IA | NASCAR Camping World Truck Series | Brett Moffitt |
| June 17, 2018 | Iowa 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Justin Allgaier |
| July 7, 2018 | Fans With Benefits 150 | Iowa Speedway, Newton, IA | ARCA Stock Car | Sheldon Creed |
| July 8, 2018 | Iowa 100 | Iowa Speedway, Newton, IA | IRL Indy Lights | Patricio O'Ward Junco |
| July 8, 2018 | Iowa Corn 300 | Iowa Speedway, Newton, IA | IRL Indy Car | James Hinchcliffe |
| July 27, 2018 | Casey's General Store 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Tyler Ankrum |
| July 28, 2018 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Christopher Bell |
| June 16, 2019 | M&Ms 200 | Iowa Speedway, Newton, IA | NASCAR Gander Outdoors Truck Series | Brett Moffitt |
| June 16, 2019 | CircuitCity.com 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Christopher Bell |
| July 19, 2019 | Fans With Benefits 150 | Iowa Speedway, Newton, IA | ARCA Stock Car | Chandler Smith |
| July 20, 2019 | Iowa 300 | Iowa Speedway, Newton, IA | IRL Indy Car | Josef Newgarden |
| July 26, 2019 | Casey's General Store 150 | Iowa Speedway, Newton, IA | NASCAR West/East Series | Sam Mayer |
| July 27, 2019 | U.S. Cellular 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Chase Briscoe |
| July 17, 2020 | Iowa 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Simon Pagenaud |
| July 18, 2020 | Iowa 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Josef Newgarden |
| July 18, 2020 | Shore Lunch 150 | Iowa Speedway, Newton, IA | ARCA Stock Car | Ty Gibbs |
| July 24, 2021 | Shore Lunch 150 | Iowa Speedway, Newton, IA | ARCA Stock Car/East Series | Ty Gibbs |
| June 11, 2022 | Calypso Lemonade 150 | Iowa Speedway, Newton, IA | ARCA Stock Car/East Series | Brandon Jones |
| July 23, 2022 | Hy-VeeDeals.com 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Josef Newgarden |
| July 23, 2022 | Iowa Speedway, Newton, IA | IRL Indy Lights | Hunter McElrea | |
| July 24, 2022 | Hy-Vee Salute to Farmers 300 | Iowa Speedway, Newton, IA | IRL Indy Car | Patricio O'Ward Junco |
| July 15, 2023 | Calypso 150 | Iowa Speedway, Newton, IA | ARCA Stock Car/East Series | Luke Fenhaus |
| July 22, 2023 | Iowa Speedway, Newton, IA | IRL Indy NXT | Christian Rasmussen | |
| July 22, 2023 | Hy-Vee Homefront 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Josef Newgarden |
| July 23, 2023 | Hy-Vee One Step 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Josef Newgarden |
| June 14, 2024 | Atlas 150 | Iowa Speedway, Newton, IA | ARCA Stock Car/East Series | Connor Zilisch |
| June 15, 2024 | HyVee Perks 250 | Iowa Speedway, Newton, IA | NASCAR Xfinity Series | Sam Mayer |
| June 16, 2024 | Iowa Corn 350 | Iowa Speedway, Newton, IA | NASCAR Cup Series | Ryan Blaney |
| July 13, 2024 | Hy-Vee Homefront 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Scott McLaughlin |
| July 13, 2024 | Iowa Speedway, Newton, IA | IRL Indy NXT | Louis Foster | |
| July 14, 2024 | Hy-Vee One Step 250 | Iowa Speedway, Newton, IA | IRL Indy Car | Will Power |