| St. James Lutheran School | Shawano | Private school | PK–8 | 0 |
| St. James School | Madison | Private school | PK–8 | 0 |
| St. Jerome School | Columbus | Private school | K–8 | 0 |
| St. Joan Antida High School | Milwaukee | Private school | 9–12 | 0 |
| St. Joan Of Arc Parish School | Nashotah | Private school | PK–8 | 0 |
| St. John Bosco Catholic School | Sturgeon Bay | Private school | PK–8 | 0 |
| St. John Evangelical Lutheran School | Peshtigo | Private school | PK–8 | 0 |
| St. John Evangelical Lutheran School | Waterloo | Private school | PK–8 | 0 |
| St. John Evangelical Lutheran School | Wrightstown | Private school | PK–8 | 0 |
| St. John Lutheran Church & School | Suring | Private school | PK–8 | 0 |
| St. John Lutheran School | Maribel | Private school | PK–8 | 0 |
| St. John Lutheran School | Random Lake | Private school | PK–6 | 0 |
| St. John Lutheran School | Berlin | Private school | K–8 | 0 |
| St. John Lutheran School | Plymouth | Private school | PK–8 | 0 |
| St. John Lutheran School | Wausau | Private school | K–8 | 0 |
| St. John Lutheran School | Merrill | Private school | PK–8 | 0 |
| St. John Nepomucene School | Little Chute | Private school | PK–8 | 0 |
| St. John Paul II Catholic School | Milwaukee | Private school | PK–8 | 0 |
| St. John Primary School | Marshfield | Private school | PK–2 | 0 |
| St. John-sacred Heart School | Sherwood | Private school | PK–8 | 0 |
| St. John-st James Lutheran School | Reedsville | Private school | PK–8 | 0 |
| St. John The Baptist Catholic School | Edgar | Private school | PK–8 | 0 |
| St. John The Baptist Catholic School | Jefferson | Private school | PK–8 | 0 |
| St. John The Baptist Catholic School | Plymouth | Private school | PK–8 | 0 |
| St. John The Baptist Catholic School | Waunakee | Private school | K–8 | 0 |
| St. John The Baptist School | Green Bay | Private school | PK–8 | 0 |
| St. John The Evangelist School | Spring Green | Private school | PK–6 | 0 |
| St. John The Evangelist School | Greenfield | Private school | PK–8 | 0 |
| St. John Vianney School | Janesville | Private school | PK–8 | 0 |
| St. John Vianney School | Brookfield | Private school | PK–8 | 0 |
| St. John Xxiii Catholic School | Port Washington | Private school | PK–8 | 0 |
| St. Johns Evangelical Lutheran School | Mukwonago | Private school | K–8 | 0 |
| St. John's Evangelical Lutheran School | Juneau | Private school | PK–8 | 0 |
| St. John's Evangelical Lutheran School | Wauwatosa | Private school | PK–8 | 0 |
| St. John's Lutheran School | Two Rivers | Private school | PK–8 | 0 |
| St. Johns Lutheran School | Portage | Private school | K–8 | 0 |
| St. John's Lutheran School | Fremont | Private school | PK–8 | 0 |
| St. John's Lutheran School | Fox Lake | Private school | PK–8 | 0 |
| St. John's Lutheran School | Neillsville | Private school | PK–8 | 0 |
| St. Johns Lutheran School | Manitowoc | Private school | PK–8 | 0 |
| St. John's Lutheran School | Pardeeville | Private school | PK–7 | 0 |
| St. Johns Lutheran School | Mayville | Private school | K–8 | 0 |
| St. Johns Lutheran School | Milwaukee | Private school | PK–8 | 0 |
| St. Johns Lutheran School | Jefferson | Private school | PK–8 | 0 |
| St. John's Lutheran School | West Bend | Private school | PK–8 | 0 |
| St. Johns Lutheran School | Glendale | Private school | PK–8 | 0 |
| St. John's Lutheran School | Montello | Private school | PK–8 | 0 |
| St. John's Lutheran School | Baraboo | Private school | PK–8 | 0 |
| St. Johns Lutheran School | Newburg | Private school | PK–8 | 0 |
| St. Johns Lutheran School | Burlington | Private school | PK–8 | 0 |