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| 5/1/2021 | Shelby County Speedway - Harlan, IA May Day Mayhem Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 6th | - | - | 5th |
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| 5/15/2021 | Shelby County Speedway - Harlan, IA Pizza Ranch presents The James Buwalda Memorial w/ Kids Candy Dash Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Vintage Full Body Stock Cars, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 4th | - | - | 8th |
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| 5/22/2021 | Shelby County Speedway - Harlan, IA Coca-Cola night Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 7th | - | - | 11th |
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| 6/12/2021 | Shelby County Speedway - Harlan, IA Shelby County Speedway - WEST Dirt Super Late Models: SLMR Late Model Series Hobby Stocks, Stock Cars, B Modifieds, Non-Winged Sprints | Results | | Paul Zimmerman (Stock Cars) | 6th | - | - | 7th |
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| 6/19/2021 | Shelby County Speedway - Harlan, IA The BuckSnort presents Father's Day Fleet Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Vintage Full Body Stock Cars, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 2nd | - | - | 7th (DNF) |
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| 7/17/2021 | Shelby County Speedway - Harlan, IA Shelby County Fair Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Vintage Full Body Stock Cars, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 1st | - | - | 2nd |
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| 8/14/2021 | Shelby County Speedway - Harlan, IA FinishLine / Let's Get Back to School w/ Kids Bike Races Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Vintage Full Body Stock Cars, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 3rd | - | - | 11th (DNF) |
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| 8/21/2021 | Shelby County Speedway - Harlan, IA IMCA Sunoco Late Model & Season Smack Down Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 5th | - | - | 9th |
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| 9/24/2021 | Shelby County Speedway - Harlan, IA Tiny Lund Night 1 / Battle of the Compacts on Hwy 59 Hobby Stocks, Stock Cars, B Modifieds, Dirt Late Models, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 9th (DNF) | - | 17th (DNF) | - |
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| 9/25/2021 | Shelby County Speedway - Harlan, IA Tiny Lund Night 2 / Dirt Truck Racing Assoc. Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt Pro Trucks, Sport Compact | Results | | Paul Zimmerman (Stock Cars) | 1st | - | - | 3rd |
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