Brandon Valley def. Mitchell, 26-28, 25-12, 25-23, 25-17
Brookings def. Yankton, 26-24, 25-14, 25-21
Harrisburg def. Watertown, 25-9, 27-25, 25-15
O’Gorman def. Huron, 25-18, 25-16, 24-26, 25-23
Rapid City Stevens def. Spearfish, 25-21, 25-17, 21-25, 25-21
Sioux Falls Jefferson def. Pierre, 25-14, 25-15, 25-12
Sioux Falls Roosevelt def. Aberdeen Central, 25-20, 25-18, 23-25, 25-13
Class B Postseason
Region 1
No. 1 Warner def. No. 9 Waverly/South Shore, 25-3, 25-5, 25-13
No. 4 Aberdeen Christian def. No. 5 Wilmont, 25-19, 25-17, 25-22
No. 2 Hitchcock-Tulare def. No. 7 Tiospa Zina, 25-14, 25-1, 25-9
No. 3 Northwestern Area def. No. 6 Langford, 25-14, 25-12, 25-8
Region 2
No. 1 Castlewood def. No. 8 Iroquois/Lake Preston, 25-13, 25-7, 25-7
No. 4 De Smet def. No. 5 Wessington Springs, 25-12, 25-15, 25-22
No. 2 Wolsey-Wessington def. No. 7 Arlington, 25-19, 25-20, 25-17
No. 3 Deubrook def. No. 6 Estelline/Hendricks, 25-20, 25-22, 25-21
Region 3
No. 1 Chester def. No. 8 Canistota, 25-16, 25-6, 25-11
No. 5 Sioux Falls Lutheran def. No. 4 Ethan, 27-25, 22-25, 25-21, 18-25, 25-13
No. 2 Colman-Egan def. No. 7 Sanborn Central/Woonsocket, 25-16, 25-17, 25-16
No. 3 Bridgewater-Emery def. No. 6 Dell Rapids St. Mary, 25-15, 25-22, 25-22
Region 4
No. 1 Gayville-Volin def. No. 9 Alcester-Hudson, 25-19, 25-16, 25-10
No. 5 Tripp-Delmont/Armour def. No. 4 Centerville, 25-20, 21-25, 25-23, 22-25, 18-16
No. 2 Parkston def. No. 10 Irene-Wakonda, 25-18, 25-15, 25-16
No. 6 Freeman def. No. 3 Menno, 23-25, 25-22, 25-20, 15-25, 15-12
Region 5
No. 1 Burke def. No. 8 Kimball/White Lake, 25-12, 25-19, 25-8
No. 5 Avon def. No. 4 Andes Central/Dakota Christian, 20-25, 25-20, 25-15, 25-17
No. 2 Gregory def. No. 7 Lower Brule, 25-12, 25-11, 25-5
No. 3 Corsica-Stickney def. No. 6 Lyman, 25-15, 25-23, 13-25, 25-20
Region 6
No. 1 Ipswich def. No. 8 Sully Buttes, 25-12, 21-25, 25-18, 25-12
No. 4 Faulkton def. No. 5 North Central, 25-23, 25-17, 22-25, 25-14
No. 2 Herreid/Selby Area def. No. 7 Tiospaye Topa, 25-7, 25-16, 25-11
No. 3 Potter County def. No. 6 Highmore-Harrold, 25-20, 25-16, 25-18
Region 7
No. 1 Kadoka def. No. 9 Crazy Horse, 25-2, 25-3, 25-1
No. 4 Jones County def. No. 5 Wall, 25-17, 25-21, 25-17
No. 2 Bennett County def. No. 7 Philip, 25-22, 25-14, 25-21
No. 3 Edgemont def. No. 6 White River, 25-14, 25-16, 25-5
Region 8
No. 1 Faith def. No. 8 McLaughlin, 25-6, 25-6, 25-5
No. 4 Timber Lake def. No. 5 Newell, 26-24, 25-9, 23-25, 25-20
No. 2 Harding County def. No. 7 McIntosh, 25-9, 25-8, 25-20
No. 3 Lemmon def. No. 6 Dupree, 25-12, 25-15, 25-18
Class A Postseason
Region 1
No. 4 Webster def. No. 5 Britton-Hecla, 25-16, 25-12, 25-19
No. 2 Aberdeen Roncalli def. No. 7 Redfield, 25-20, 25-17, 25-23
No. 6 Milbank def. No. 3 Sisseton, 25-14, 25-18, 15-25, 25-11
Region 2
No. 4 Clark-Willow Lake def. No. 5 Elkton/Lake Benton, 25-12, 25-19, 23-25, 25-22
No. 2 Great Plains Lutheran def. No. 7 Deuel, 25-11, 25-13, 25-10
No. 3 Sioux Valley def. No. 6 Florence/Henry, 25-12, 25-9, 25-12
Region 3
No. 5 West Central def. No. 4 Madison, 23-25, 25-22, 25-21, 25-23
No. 2 Baltic def. No. 7 Flandreau, 25-8, 25-14, 25-10
No. 3 Garretson def. No. 6 Tri-Valley, 25-15, 25-18, 25-17
Region 4
No. 5 Lennox def. No. 4 Canton, 18-25, 25-21, 25-21, 25-19
No. 2 Elk Point-Jefferson def. No. 7 Vermillion, 25-4, 25-15, 25-8
No. 3 Sioux Falls Christian def. No. 6 Beresford, 25-5, 25-17, 25-16
Region 5
No. 5 Bon Homme def. No. 4 Parker, 13-25, 19-25, 25-21, 27-25, 19-17
No. 3 Wagner def. No. 6 McCook Central/Montrose, 25-21, 25-22, 25-23
Region 6
No. 5 Platte-Geddes def. No. 4 Cheyanne-Eagle Butte, 25-23, 25-17, 25-14
No. 2 Mobridge-Pollock def. No. 7 Crow Creek, 25-11, 25-11, 25-7
No. 3 Stanley County def. No. 6 Chamberlain, 25-22, 25-16, 25-20
Region 7
No. 4 Todd County def. No. 5 Red Cloud, 26-24, 16-25, 25-16, 16-25, 25-10
No. 2 Lakota Tech def. No. 7 St. Francis Indian, 25-10, 25-7, 25-8
No. 3 Pine Ridge def. No. 6 Little Wound, 25-21, 25-20, 22-25, 26-24
Region 8
No. 4 Rapid City Christian def. No. 6 Hot Springs, 25-21, 12-25, 25-15, 16-25, 15-5
No. 2 St. Thomas More def. No. 7 Lead-Deadwood, 25-15-, 25-17, 25-6
No. 3 Custer def. No. 6 Belle Fourche, 25-14, 25-11, 25-21