| United States Senator | Julian Beaudion | DEM | 04/04/2026 | | 1 | | 2604 S Kierra Ct Sioux Falls SD 57106-5008 | 110 | Julian | | Beaudion | | Active | Primary | 6/2/2026 12:00:00 AM | 2604 S Kierra Ct | | Sioux Falls | SD | 57106-5008 | SW | |
| United States Senator | Justin McNeal | REP | 04/05/2026 | | 1 | | 1201 Kulpaca Pl Rapid City SD 57701 | 110 | Justin | | McNeal | | Active | Primary | 6/2/2026 12:00:00 AM | 1201 Kulpaca Pl | | Rapid City | SD | 57701 | SW | |
| United States Senator | Mike Rounds | REP | 03/27/2026 | | 2 | | 2418 Whispering Shores Dr. Fort Pierre SD 57532-2403 | 110 | Mike | | Rounds | | Active | Primary | 6/2/2026 12:00:00 AM | 2418 Whispering Shores Dr. | | Fort Pierre | SD | 57532-2403 | SW | |
| United States Representative | Nicole "Nikki" Gronli | DEM | 04/01/2026 | | 1 | | 24620 479th Ave Dell Rapids SD 57022 | 120 | Nicole "Nikki" | | Gronli | | Active | Primary | 6/2/2026 12:00:00 AM | 24620 479th Ave | | Dell Rapids | SD | 57022 | SW | |
| United States Representative | Marty Jackley | REP | 04/01/2026 | | 1 | | PO Box 314 Pierre SD 57501 | 120 | Marty | | Jackley | | Active | Primary | 6/2/2026 12:00:00 AM | PO Box 314 | | Pierre | SD | 57501 | SW | |
| United States Representative | James Bialota Jr | REP | 04/06/2026 | | 2 | | 16909 El Camino Ct Piedmont SD 57769 | 120 | James | | Bialota | Jr | Active | Primary | 6/2/2026 12:00:00 AM | 16909 El Camino Ct | | Piedmont | SD | 57769 | SW | |
| Governor | Dan Ahlers | DEM | 04/02/2026 | | 1 | | 913 N Washington Ave Dell Rapids SD 57022 | 200 | Dan | | Ahlers | | Active | Primary | 6/2/2026 12:00:00 AM | 913 N Washington Ave | | Dell Rapids | SD | 57022 | SW | |
| Governor | Larry Rhoden | REP | 03/24/2026 | | 1 | | PO Box 12 Union Center SD 57787 | 200 | Larry | | Rhoden | | Active | Primary | 6/2/2026 12:00:00 AM | PO Box 12 | | Union Center | SD | 57787 | SW | |
| Governor | Jon Hansen | REP | 03/23/2026 | | 2 | | 47484 Dells Dr Dell Rapids SD 57022-5330 | 200 | Jon | | Hansen | | Active | Primary | 6/2/2026 12:00:00 AM | 47484 Dells Dr | | Dell Rapids | SD | 57022-5330 | SW | |
| Governor | Dusty Johnson | REP | 03/16/2026 | | 3 | | PO Box 278 Mitchell SD 57301 | 200 | Dusty | | Johnson | | Active | Primary | 6/2/2026 12:00:00 AM | PO Box 278 | | Mitchell | SD | 57301 | SW | |
| Governor | Toby Doeden | REP | 04/05/2026 | | 4 | | 13371 382nd Ave Aberdeen SD 57401 | 200 | Toby | | Doeden | | Active | Primary | 6/2/2026 12:00:00 AM | 13371 382nd Ave | | Aberdeen | SD | 57401 | SW | |
| State Senator | Michael H. Rohl | REP | 03/04/2026 | District 01 | | | 38635 129th Street Aberdeen SD 57401 | 300 | Michael | H. | Rohl | | Active | Primary | 6/2/2026 12:00:00 AM | 38635 129th Street | | Aberdeen | SD | 57401 | SEN | |
| State Senator | Manuel Luschas (Withdrawn 02/11/2026) | REP | 01/23/2026 | District 02 | | 02/11/2026 | 1813 S Parkview Blvd Brandon SD 57005 | 300 | Manuel | | Luschas | | Withdrawn | Primary | 6/2/2026 12:00:00 AM | 1813 S Parkview Blvd | | Brandon | SD | 57005 | SEN | |
| State Senator | David Kull | REP | 03/11/2026 | District 02 | 1 | | 408 N Sunday Dr Brandon SD 57005 | 300 | David | | Kull | | Active | Primary | 6/2/2026 12:00:00 AM | 408 N Sunday Dr | | Brandon | SD | 57005 | SEN | |
| State Senator | John Sjaarda | REP | 02/02/2026 | District 02 | 2 | | 115 Lynx St Valley Springs SD 57068 | 300 | John | | Sjaarda | | Active | Primary | 6/2/2026 12:00:00 AM | 115 Lynx St | | Valley Springs | SD | 57068 | SEN | |
| State Senator | Carl Perry | REP | 01/12/2026 | District 03 | 1 | | 2722 Railroad Cir Aberdeen SD 57401 | 300 | Carl | | Perry | | Active | Primary | 6/2/2026 12:00:00 AM | 2722 Railroad Cir | | Aberdeen | SD | 57401 | SEN | |
| State Senator | Katherine "Katie" Washnok | REP | 03/11/2026 | District 03 | 2 | | 4644 130th Street Aberdeen SD 57401 | 300 | Katherine | "Katie" | Washnok | | Active | Primary | 6/2/2026 12:00:00 AM | 4644 130th Street | | Aberdeen | SD | 57401 | SEN | |
| State Senator | Timothy Begalka | REP | 03/30/2026 | District 04 | 1 | | 18254 SD Highway 15 Clear Lake SD 57226 | 300 | Timothy | | Begalka | | Active | Primary | 6/2/2026 12:00:00 AM | 18254 SD Highway 15 | | Clear Lake | SD | 57226 | SEN | |
| State Senator | Stephanie Sauder | REP | 02/23/2026 | District 04 | 2 | | PO Box 94 Bryant SD 57221 | 300 | Stephanie | | Sauder | | Active | Primary | 6/2/2026 12:00:00 AM | PO Box 94 | | Bryant | SD | 57221 | SEN | |
| State Senator | Josephine Garcia | REP | 03/11/2026 | District 05 | 1 | | 816 Hidden Valley Drive Watertown SD 57201 | 300 | Josephine | | Garcia | | Active | Primary | 6/2/2026 12:00:00 AM | 816 Hidden Valley Drive | | Watertown | SD | 57201 | SEN | |
| State Senator | Glen A. Vilhauer | REP | 02/17/2026 | District 05 | 2 | | PO Box 1091 Watertown SD 57201 | 300 | Glen | A. | Vilhauer | | Active | Primary | 6/2/2026 12:00:00 AM | PO Box 1091 | | Watertown | SD | 57201 | SEN | |
| State Senator | Ernie Otten | REP | 01/06/2026 | District 06 | | | 46787 273rd St Tea SD 57064 | 300 | Ernie | | Otten | | Active | Primary | 6/2/2026 12:00:00 AM | 46787 273rd St | | Tea | SD | 57064 | SEN | |
| State Senator | Tim Reed | REP | 03/11/2026 | District 07 | | | 1409 Whitetail Path Brookings SD 57006 | 300 | Tim | | Reed | | Active | Primary | 6/2/2026 12:00:00 AM | 1409 Whitetail Path | | Brookings | SD | 57006 | SEN | |
| State Senator | Casey Crabtree | REP | 03/18/2026 | District 08 | | | 115 Woodland Drive Madison SD 57042 | 300 | Casey | | Crabtree | | Active | Primary | 6/2/2026 12:00:00 AM | 115 Woodland Drive | | Madison | SD | 57042 | SEN | |
| State Senator | Patricia K Shiery (Successful Challenge - Decertified 04/07/2026) | REP | 03/30/2026 | District 08 | | 04/07/2026 | 420 S DIVISION AVE Madison SD 57042-3125 | 300 | Patricia | K | Shiery | | Challenge | Primary | 6/2/2026 12:00:00 AM | 420 S DIVISION AVE | | Madison | SD | 57042-3125 | SEN | |
| State Senator | Todd Wilkinson (Withdrawn ) | REP | 03/12/2026 | District 08 | | | PO Box 29 De Smet SD 57231 | 300 | Todd | | Wilkinson | | Withdrawn | Primary | 6/2/2026 12:00:00 AM | PO Box 29 | | De Smet | SD | 57231 | SEN | |
| State Senator | Daryl Christensen | REP | 03/27/2026 | District 09 | 1 | | 46227 S Shore Pl. Hartford SD 57033 | 300 | Daryl | | Christensen | | Active | Primary | 6/2/2026 12:00:00 AM | 46227 S Shore Pl. | | Hartford | SD | 57033 | SEN | |
| State Senator | Joy Hohn | REP | 03/05/2026 | District 09 | 2 | | 46178 263rd St. Hartford SD 57033 | 300 | Joy | | Hohn | | Active | Primary | 6/2/2026 12:00:00 AM | 46178 263rd St. | | Hartford | SD | 57033 | SEN | |
| State Senator | Liz Larson | DEM | 03/04/2026 | District 10 | | | 2013 S Main Ave Sioux Falls SD 57105 | 300 | Liz | | Larson | | Active | Primary | 6/2/2026 12:00:00 AM | 2013 S Main Ave | | Sioux Falls | SD | 57105 | SEN | |
| State Senator | Michael Dupic (Successful Challenge - Decertified ) | REP | 03/18/2026 | District 10 | | | 2801 E Madison St., Apt 105 Sioux Falls SD 57103 | 300 | Michael | | Dupic | | Challenge | Primary | 6/2/2026 12:00:00 AM | 2801 E Madison St., Apt 105 | | Sioux Falls | SD | 57103 | SEN | |
| State Senator | Michael Dupic | REP | 03/30/2026 | District 10 | | | 2801 E Madison St., Apt 105 Sioux Falls SD 57103 | 300 | Michael | | Dupic | | Active | Primary | 6/2/2026 12:00:00 AM | 2801 E Madison St., Apt 105 | | Sioux Falls | SD | 57103 | SEN | |
| State Senator | Aaron Matson | DEM | 02/18/2026 | District 11 | 1 | | 4701 S Key Ave Sioux Falls SD 57106 | 300 | Aaron | | Matson | | Active | Primary | 6/2/2026 12:00:00 AM | 4701 S Key Ave | | Sioux Falls | SD | 57106 | SEN | |
| State Senator | Chris Karr | REP | 03/30/2026 | District 11 | 1 | | 7421 W Luke Dr Sioux Falls SD 57106 | 300 | Chris | | Karr | | Active | Primary | 6/2/2026 12:00:00 AM | 7421 W Luke Dr | | Sioux Falls | SD | 57106 | SEN | |
| State Senator | Graham Oey | REP | 03/24/2026 | District 11 | 2 | | 7126 W Rosemont Ln Sioux Falls SD 57106 | 300 | Graham | | Oey | | Active | Primary | 6/2/2026 12:00:00 AM | 7126 W Rosemont Ln | | Sioux Falls | SD | 57106 | SEN | |
| State Senator | Joe Zweifel | DEM | 04/03/2026 | District 12 | 1 | | 3120 W Rambler PL #301 Sioux Falls SD 57108 | 300 | Joe | | Zweifel | | Active | Primary | 6/2/2026 12:00:00 AM | 3120 W Rambler PL #301 | | Sioux Falls | SD | 57108 | SEN | |
| State Senator | Kari Shanard-Koenders | REP | 03/26/2026 | District 12 | 1 | | 3005 W Spruceleigh Ct. Sioux Falls SD 57105 | 300 | Kari | | Shanard-Koenders | | Active | Primary | 6/2/2026 12:00:00 AM | 3005 W Spruceleigh Ct. | | Sioux Falls | SD | 57105 | SEN | |
| State Senator | Arch Beal (Withdrawn 04/07/2026) | REP | 03/27/2026 | District 12 | 2 | 04/07/2026 | 4001 W 74TH ST Sioux Falls SD 57108 | 300 | Arch | | Beal | | Withdrawn | Primary | 6/2/2026 12:00:00 AM | 4001 W 74TH ST | | Sioux Falls | SD | 57108 | SEN | |
| State Senator | Sue Peterson | REP | 01/23/2026 | District 13 | 1 | | 6405 S Killarney Cir Sioux Falls SD 57108 | 300 | Sue | | Peterson | | Active | Primary | 6/2/2026 12:00:00 AM | 6405 S Killarney Cir | | Sioux Falls | SD | 57108 | SEN | |
| State Senator | Dan Kippley | REP | 03/11/2026 | District 13 | 2 | | 2601 S Minnesota Ave. Unit 105, Box 245 Sioux Falls SD 57105 | 300 | Dan | | Kippley | | Active | Primary | 6/2/2026 12:00:00 AM | 2601 S Minnesota Ave. Unit 105, Box 245 | | Sioux Falls | SD | 57105 | SEN | |
| State Senator | Larry P. Zikmund | REP | 03/11/2026 | District 14 | 1 | | 2405 East 52nd St Sioux Falls SD 57103 | 300 | Larry | P. | Zikmund | | Active | Primary | 6/2/2026 12:00:00 AM | 2405 East 52nd St | | Sioux Falls | SD | 57103 | SEN | |
| State Senator | R. Shawn Tornow | REP | 03/30/2026 | District 14 | 2 | | 3800 W. Technology Circle, #101 Sioux Falls SD 57106 | 300 | R. Shawn | | Tornow | | Active | Primary | 6/2/2026 12:00:00 AM | 3800 W. Technology Circle, #101 | | Sioux Falls | SD | 57106 | SEN | |
| State Senator | Erik Muckey | DEM | 02/03/2026 | District 15 | | | 196 E 6th St Apt 308 Sioux Falls SD 57104 | 300 | Erik | | Muckey | | Active | Primary | 6/2/2026 12:00:00 AM | 196 E 6th St Apt 308 | | Sioux Falls | SD | 57104 | SEN | |
| State Senator | Brenda Lawrence | REP | 04/03/2026 | District 15 | | | 216 S Summit Ave Sioux Falls SD 57104 | 300 | Brenda | | Lawrence | | Active | Primary | 6/2/2026 12:00:00 AM | 216 S Summit Ave | | Sioux Falls | SD | 57104 | SEN | |
| State Senator | Kevin D. Jensen | REP | 02/09/2026 | District 16 | | | 27808 484th Ave Canton SD 57013 | 300 | Kevin | D. | Jensen | | Active | Primary | 6/2/2026 12:00:00 AM | 27808 484th Ave | | Canton | SD | 57013 | SEN | |
| State Senator | Jeffrey D. Church | REP | 03/13/2026 | District 17 | 1 | | 826 N Crawford Road Vermillion SD 57069 | 300 | Jeffrey | D. | Church | | Active | Primary | 6/2/2026 12:00:00 AM | 826 N Crawford Road | | Vermillion | SD | 57069 | SEN | |
| State Senator | Sydney Davis | REP | 01/13/2026 | District 17 | 2 | | 46838 307th St Burbank SD 57010 | 300 | Sydney | | Davis | | Active | Primary | 6/2/2026 12:00:00 AM | 46838 307th St | | Burbank | SD | 57010 | SEN | |
| State Senator | Kay Swihart | DEM | 03/26/2026 | District 18 | 1 | | 296 Gavins Point Rd Yankton SD 57078-6215 | 300 | Kay | | Swihart | | Active | Primary | 6/2/2026 12:00:00 AM | 296 Gavins Point Rd | | Yankton | SD | 57078-6215 | SEN | |
| State Senator | Lauren Nelson | REP | 03/30/2026 | District 18 | 1 | | 44112 306TH St Yankton SD 57078 | 300 | Lauren | | Nelson | | Active | Primary | 6/2/2026 12:00:00 AM | 44112 306TH St | | Yankton | SD | 57078 | SEN | |
| State Senator | Jean Hunhoff | REP | 02/09/2026 | District 18 | 2 | | 2511 Mulligan Dr Yankton SD 57078 | 300 | Jean | | Hunhoff | | Active | Primary | 6/2/2026 12:00:00 AM | 2511 Mulligan Dr | | Yankton | SD | 57078 | SEN | |
| State Senator | Russell E. Graeff | DEM | 03/26/2026 | District 19 | 1 | | PO Box 196 Scotland SD 57059-2072 | 300 | Russell | E. | Graeff | | Active | Primary | 6/2/2026 12:00:00 AM | PO Box 196 | | Scotland | SD | 57059-2072 | SEN | |