| House 1 | Jeff Smith (R) 99.23% | Unopposed | |
| House 2 | Megan Jones (R) 56.48% | Steve Bomgaars (D) 43.43% | |
| House 3 | Daniel Huseman (R) 99.62% | Unopposed | |
| House 4 | Dwayne Alons (R) 99.6% | Unopposed | |
| House 5 | Chuck Soderberg (R) 99.35% | Unopposed | |
| House 6 | Ron Jorgensen (R) 97.81% | Unopposed | |
| House 7 | Tedd Gassman (R) 50.08% | John Wittneben (D) 49.8% | Flipped D to R; Incumbent defeated |
| House 8 | Henry Vincent Rayhons (R) 98.86% | Unopposed | |
| House 9 | Helen Miller (D) 60.58% | Matt Alcazar (R) 39.31% | |
| House 10 | Tom W. Shaw (R) 98.59% | Unopposed | |
| House 11 | Gary Worthan (R) 98.75% | Unopposed | |
| House 12 | Dan Muhlbauer (D) 61.02% | Barney Bornhoft (R) 38.92% | |
| House 13 | Chris Hall (D) 53.24% | Jeremy Taylor (R) 46.64% | Flipped R to D; Incumbent defeated |
| House 14 | David Alan Dawson (D) 59.43% | Greg Grupp (R) 40.36% | |
| House 15 | Mark A. Brandenburg (R) 52.01% | George Warren Yaple (D) 47.82% | |
| House 16 | Mary Ann Hanusa (R) 57.11% | Heidi Guggisberg-C oners (D) 42.68% | |
| House 17 | Matt Windschitl (R) 98.73% | Unopposed | |
| House 18 | Jason Schultz (R) 65.19% | Kasey Friedrichsen (D) 34.4% | |
| House 19 | Ralph Watts (R) 58.49% | Kenneth P. Herring (D) 41.38% | |
| House 20 | Clel Baudler (R) 57.84% | Greg Nepstad (D) 41.96% | |
| House 21 | Jack Drake (R) 56.85% | John Rose (D) 43.02% | |
| House 22 | Greg Forristall (R) 98.34% | Unopposed | |
| House 23 | Mark Costello (R) 98.97% | Unopposed | |
| House 24 | Cecil Dolecheck (R) 99.23% | Unopposed | |
| House 25 | Julian Garrett (R) 54.76% | Katie Routh (D) 45.15% | |
| House 26 | Scott Ourth (D) 51.97% | Steve McCoy (R) 47.7% | |
| House 27 | Joel Fry (R) 67.34% | Ruth Eileen Smith (I) 32.54% | |
| House 28 | Greg T. Heartsill (R) 55.48% | Megan Suhr (D) 44.46% | |
| House 29 | Dan Kelley (D) 62.29% | Gabe Swersie (R) 37.55% | |
| House 30 | Joe Riding (D) 52.03% | Jim Carley (R) 47.76% | |
| House 31 | Rick Olson (D) 97.51% | Unopposed | |
| House 32 | Ruth Ann Gaines (D) 72.11% | Joe Corbin (R) 27.77% | |
| House 33 | Kevin McCarthy (D) 72.44% | Daniel G. LeRette (R) 27.28% | |
| House 34 | Bruce L. Hunter (D) 65.48% | Patti Branco (R) 34.24% | |
| House 35 | Ako Abdul-Samad (D) 73.17% | Terrance Williams (R) 26.58% | |
| House 36 | Marti Anderson (D) 67.74% | Jeff Ibbotson (R) 32.01% | |
| House 37 | John Landon (R) 74.84% | N. John Boehm (I) 24.39% | |
| House 38 | Kevin Koester (R) 52.41% | John Phoenix (D) 43.17%, Brett Nelson (I) 4.31% | |
| House 39 | Jake Highfill (R) 52.05% | Kelsey Clark (D) 47.8% | |
| House 40 | John Forbes (D) 53.07% | Mike Brown (R) 46.84% | |
| House 41 | Jo Oldson (D) 70.26% | Clarke Davidson (R) 29.46% | |
| House 42 | Peter Cownie (R) 56.56% | Mike McRae (D) 43.34% | |
| House 43 | Chris Hagenow (R) 50.02% | Susan Judkins (D) 49.89% | |
| House 44 | Rob Taylor (R) 58.19% | Eric Brenneman (D) 41.72% | |
| House 45 | Beth Wessel-Kroeschell (D) 59.2% | Dane Nealson (R) 34.58%, Eric Cooper (L) 6.04% | |
| House 46 | Lisa Heddens (D) 62.77% | Stephen Quist (R) 37.03% | |
| House 47 | Chip Baltimore (R) 52.39% | Donovan Olson (D) 47.52% | |
| House 48 | Robert Bacon (R) 55.14% | Becky Perkovich (D) 44.77% | |
| House 49 | Dave Deyoe (R) 59.77% | Kevin Ericson (D) 40.13% | |
| House 50 | Pat Grassley (R) 97.68% | Unopposed | |
| House 51 | Josh Byrnes (R) 64.55% | Eric S. Hungerford (D) 35.38% | |
| House 52 | Brian J. Quirk (D) 71.33% | Craig A. Clark (I) 28.57% | |
| House 53 | Sharon Steckman (D) 97.91% | Unopposed | |
| House 54 | Linda Upmeyer (R) 98.78% | Unopposed | |
| House 55 | Roger Thomas (D) 50.6% | Mike Klimesh (R) 49.33% | |
| House 56 | Patti Ruff (D) 51.01% | Bob Hager (R) 48.88% | Flipped R to D; Incumbent defeated |
| House 57 | Nancy A. Dunkel (D) 98.13% | Unopposed | |
| House 58 | Brian S. Moore (R) 51.28% | Tom Schueller (D) 48.61% | |
| House 59 | Bob Kressig (D) 56.9% | James R. Kenyon (R) 42.99% | |
| House 60 | Walt Rogers (R) 51.9% | Bob Greenwood (D) 48.03% | |
| House 61 | Anesa Kajtazovic (D) 70.19% | Lyn Tackett (R) 29.7% | |
| House 62 | Deborah L. Berry (D) 87.04% | Chad Folken (I) 12.77% | |
| House 63 | Sandy Salmon (R) 50.32% | Bill Heckroth (D) 49.62% | |
| House 64 | Bruce Bearinger (D) 65.39% | Jim Givant (R) 34.49% | |
| House 65 | Tyler Olson (D) 98.52% | Unopposed | |
| House 66 | Art Staed (D) 54.99% | Renee Schulte (R) 44.86% | Flipped R to D; Incumbent defeated |
| House 67 | Kraig Paulsen (R) 52.78% | Mark J. Seidl (D) 47.14% | |
| House 68 | Daniel Lundby (D) 50.29% | Nick Wagner (R) 49.59% | Flipped R to D; Incumbent defeated |
| House 69 | Kirsten Running-Marq uardt (D) 98.57% | Unopposed | |
| House 70 | Todd Taylor (D) 63.79% | Lance Lefebure (R) 36.07% | |
| House 71 | Mark Smith (D) 59.25% | Allen Burt (R) 40.68% | |
| House 72 | Dean Fisher (R) 50.65% | Nathan Wrage (D) 49.24% | |
| House 73 | Bobby Kaufmann (R) 56.27% | Dick Schwab (D) 43.54% | |
| House 74 | Dave Jacoby (D) 98.19% | Unopposed | |
| House 75 | Dawn Pettengill (R) 58.54% | Sandra K. Cronbaugh (D) 41.38% | |
| House 76 | David Maxwell (R) 52.59% | Rachel Bly (D) 47.33% | |
| House 77 | Sally Stutsman (D) 59.83% | Steve Sherman (R) 40.11% | |
| House 78 | Jarad Klein (R) 98.28% | Unopposed | |
| House 79 | Guy Vander Linden (R) 71.98% | Chris Wilson (D) 27.83% | |
| House 80 | Larry Sheets (R) 50.32% | Joseph Judge (D) 49.56% | |
| House 81 | Mary Gaskill (D) 59.8% | Blake Smith (R) 40.03% | |
| House 82 | Curt Hanson (D) 58.94% | James F. Johnson (R) 40.95% | |
| House 83 | Jerry Kearns (D) 63.62% | James Steffen (R) 36.18% | |
| House 84 | Dave Heaton (R) 98.51% | Unopposed | |
| House 85 | Vicki Lensing (D) 98.38% | Unopposed | |
| House 86 | Mary Mascher (D) 98.29% | Unopposed | |
| House 87 | Dennis Cohoon (D) 47.16% | Dan Cahill (I) 35.78%, Andrew Wilson (R) 17.02% | |
| House 88 | Tom Sands (R) 53.44% | Sara Sedlacek (D) 46.38% | |
| House 89 | Jim Lykam (D) 67.38% | Bill Edmond (R) 32.48% | |
| House 90 | Cindy Winckler (D) 73.19% | Ryan Roberson (R) 21.92%, Mark J. Riley (I) 4.78% | |
| House 91 | Mark Lofgren (R) 53.2% | John Dabeet (D) 46.65% | |
| House 92 | Frank B. Wood (D) 52.34% | Ross Paustian (R) 47.56% | Flipped R to D; Incumbent defeated |
| House 93 | Phyllis Thede (D) 56.52% | Mark Nelson (R) 43.38% | |
| House 94 | Linda J. Miller (R) 55.36% | Maria Bribriesco (D) 44.56% | |
| House 95 | Quentin Stanerson (R) 50.57% | Kristin Keast (D) 49.37% | |
| House 96 | Lee Hein (R) 98.27% | Unopposed | |
| House 97 | Steven N. Olson (R) 60.52% | Ted Whisler (D) 39.42% | |
| House 98 | Mary Wolfe (D) 76.16% | Carolyn Grimes (I) 23.71% | |
| House 99 | Pat Murphy (D) 59.64% | Paul Kern (R) 40.29% | |
| House 100 | Charles Isenhart (D) 98.05% | Unopposed | |
| Senate 2 | Randy Feenstra (R) 99.63% | Unopposed | |
| Senate 4 | Dennis Guth (R) 52.81% | Bob Jennings (D) 47.1% | |
| Senate 6 | Mark Segebart (R) 57.02% | Mary C. Bruner (D) 42.91% | |
| Senate 8 | Michael E. Gronstal (D) 55.25% | Al Ringgenberg (R) 44.6% | |
| Senate 10 | Jake Chapman (R) 97.92% | Unopposed | |
| Senate 12 | Joni K. Ernst (R) 99.06% | Unopposed | |
| Senate 14 | Amy Sinclair (R) 60.83% | Dick Schrad (D) 39.08% | |
| Senate 16 | Dick L. Dearden (D) 65.37% | David Scott Edwards (R) 34.46% | |
| Senate 18 | Janet Petersen (D) 69.01% | Vicki Stogdill (R) 30.78% | |
| Senate 20 | Brad Zaun (R) 96.06% | Unopposed | |
| Senate 22 | Pat Ward (R) 56.35% | Desmund Adams (D) 43.23% | |
| Senate 24 | Jerry Behn (R) 54.75% | Shelly Stotts (D) 45.15% | |
| Senate 26 | Mary Jo Wilhelm (D) 50.17% | Merlin Bartz (R) 49.77% | Flipped R to D; Incumbent defeated |
| Senate 28 | Michael Breitbach (R) 49.99% | John W. Beard (D) 49.94% | |
| Senate 30 | Jeff Danielson (D) 50.99% | Matt Reisetter (R) 48.94% | |
| Senate 32 | Brian Schoenjahn (D) 53.2% | Elliott Henderson (R) 46.71% | |
| Senate 34 | Liz Mathis (D) 61.2% | Ryan Flood (R) 38.73% | |
| Senate 36 | Steven Sodders (D) 54.02% | Jane A. Jech (R) 45.87% | |
| Senate 38 | Tim Kapucian (R) 54.74% | Shelley Parbs (D) 45.19% | |
| Senate 40 | Ken Rozenboom (R) 60.12% | Tim Tripp (D) 39.8% | |
| Senate 42 | Rich Taylor (D) 50.59% | Larry W. Kruse (R) 44.62%, Michael Garmoe (I) 4.69% | |
| Senate 44 | Thomas Courtney (D) 56.9% | Brad Bourn (R) 42.94% | |
| Senate 46 | Chris Brase (D) 53.3% | Shawn Hamerlinck (R) 46.58% | Flipped R to D; Incumbent defeated |
| Senate 48 | Dan Zumbach (R) 50.84% | Nate Willems (D) 49.11% | |
| Senate 49 | Rita Hart (D) 54.56% | Andrew Naeve (R) 45.39% | |
| Senate 50 | Pam Jochum (D) 67.94% | William Johnson (R) 31.97% | |