| Sebastiao Ribeiro | Edmond | Oklahoma | Approved | 25012 | Grade 2 | Grade 3 | | | | | | |
| Sabrina Richert | New Haven | IN | Approved | 26020 | Grade 4 Senior (18 and over) | Grade 4 | | | | | | |
| Aidan Rito | Bingham Farms | MI | Approved | 20297 | Grade 3 | Grade 3 | | | | | | |
| Ian Rito | Bingham Farms | MI | Approved | 25007 | | | Grade 4 | | | | | |
| Lucas Robinson | Oakwood | OH | Approved | 26051 | Grade 3 | Grade 3 | | | | | | |
| John Rusfeldt | Kenosha | WI | Approved | 26064 | | | Grade 5 | | | | | |
| Garrett Russell | Benton | AR | Approved | 20344 | Grade 5 Senior (18 and over) | | Grade 3 | Novice | Novice | | | |
| Colleen Ryan | Newark | Ohio | Approved | 20848 | Grade 3 | Grade 3 | | | | | | |
| Michael Samson | Pemberville | Ohio | Approved | 26063 | Grade 4 Senior (18 and over) | Grade 4 | | | | | | |
| Paul Savereide | Eden Prairie | MN | Approved | 20911 | Grade 4 Senior (18 and over) | Grade 4 | | | | | | |
| Leslie Schier | Grinnell | IA | Approved | 26107 | Grade 3 | | | | | | | |
| Adam Schiller | Shakopee | Minnesota | Approved | 26071 | Grade 4 Senior (18 and over) | Grade 4 | Grade 4 | Novice | Novice | | | |
| Caitlin Schneider | Cincinnati | OH | Approved | 25016 | Grade 4 Senior (18 and over) | Grade 4 | | | | | | |
| Nolan Schoenle | Bloomington | Illinois | Approved | 20258 | Grade 3 | | | | | | | |
| Todd Schroeder | OTTAWA | OH | Approved | 20841 | Grade 4 Senior (18 and over) | Grade 4 | | | | | | |
| Shaun Schuetz | Lancaster | Ohio | Approved | 26033 | | | Grade 2 | | | | | |
| Geoffrey Scigliano | Hernando | MS | Approved | 20870 | Grade 4 Senior (18 and over) | Grade 4 | | | | | | |
| William Scigliano | Hernando | MS | Approved | 20871 | | | Grade 4 | | | | | |
| Kim Sievewright | Saint Francis | WI | Approved | 20298 | | | Grade 5 | Intermediate | | | | |
| JASON SILVEY | Royal Oak | MI | Approved | 20897 | Grade 4 Senior (18 and over) | Grade 4 | | | | | | |
| Jim Sim | Peotone | IL | Approved | 20158 | | | | | | | Register as an Adjudicator | |
| Cameron Sinibaldi | Elma | NY | Approved | 26069 | | | Grade 1 | | | | | |
| Jack Skelly | Chicago | Illinois | Approved | 20803 | Grade 4 Junior (under 18) | (none) | | | | | | |
| Timothy Sleeman | Aweres township | Ontario Canada | Approved | 26005 | | | Grade 4 | | | | | |
| Killian Smith | Grand Rapids | MI | Approved | 20178 | Grade 3 | Grade 3 | | | | | | |
| Jonathan Snow | Troy | Michigan | Approved | 20109 | Grade 2 | Grade 1 | | | | | | |
| Henry Spangler | Topeka | KS | Approved | 26024 | | | | | | | | Register as a Supporting Member |
| Andrew Spitsnogle | Prairie Village | KS | Approved | 26052 | Grade 1 | (none) | | | | | | |
| Lillian Spivey | Howell | Michigan | Approved | 25051 | Grade 5 Junior (under 18) | (none) | | | | | | |
| Andrew Spivey | Howell | Michigan | Approved | 25083 | Grade 5 Senior (18 and over) | | | | | | | |
