The St. Louis Jr. Blues opted for balance in their selections in the 2012 NA3HL Entry Draft. Players that were tendered and drafted represent 11 different teams from California to New Jersey with 9 local teams represented. In the draft, 13 forwards, 5 defensemen, and 2 goaltenders were taken from local AAA, CSDHL AA, and High School programs and one from the New Jersey Titans. In alphabetical order:
| P.J. | Adams | F | St. Louis Amateur Blues 16U |
| Ryan | Basgall | D | St. Louis Amateur Blues 16U |
| Brett | Bauza | F | St. Louis Amateur Blues 18U |
| Jimmy | Berger | D | St. Louis Amateur Blues 18U |
| Nick | Edwards | F | Affton CSDHL 18U |
| Robert | Hintz | F | St. Louis Jr. Blues |
| Trace | Jablin | F | St. Louis Amateur Blues 16U |
| Patrick | Kearns | D | New Jersey Titans |
| Jalen | Krogman | F | St. Louis Selects 18U |
| Hunt | Lucas | F | St. Louis Selects 16U |
| Kerry | McGlynn | F | Affton CSDHL 18U |
| Brad | Nolan | D | Affton CSDHL 18U |
| Daniel | Rosse | F | St. Louis Amateur Blues 16U |
| Danny | Selby | G | Twin Bridges CSDHL 18U |
| Brady | Shaw | F | St. Louis Amateur Blues 18U |
| Sam | Turner | F | Marquette HS |
| Daniel | Warnecke | F | St. Louis Amateur Blues 16U |
| Dusty | Watt | F | Twin Bridges CSDHL 18U |
| Jake | Wynd | D | Chesterfield CSDHL 18U |
| Cameron | Yang | G | Affton CSDHL 18U |
