| Business | Phone |
| Big Sioux Baptist Mission 106 S Veterans St, Flandreau 57028 | (605) 997-2139 |
| Catholic Church-St Simon-Jude 105 S Bates St, Flandreau 57028 | (605) 997-2180 |
| Second Presbyterian Church 101 N Prairie St, Flandreau 57028 | (605) 997-3244 |
| Redeemer Lutheran Church 508 W 1st Ave, Flandreau 57028 | (605) 997-3848 |
| Flandreau United Methodist Chr 210 N Prairie St, Flandreau 57028 | (605) 997-2857 |
| Our Saviour's Lutheran Church 505 S Wind St, Flandreau 57028 | (605) 997-2186 |
| Messiah Lutheran Church 48458 240th St, Flandreau 57028 | (605) 997-2013 |
| Midway Lutheran Church 47156 225th St, Flandreau 57028 | (605) 997-3528 |