| Business | Phone |
| City Auditorium 222 Main St, Gregory 57533 | (605) 835-8242 |
| Gregory Ambulance 400 Park Ave, Gregory 57533 | (605) 835-8302 |
| Gregory Ambulance 405 Whittecar Ave, Gregory 57533 | (605) 000-1111 |
| Gregory City Superintendent 120 W 6th St, Gregory 57533 | (605) 835-8270 |
| Gregory Pumping Station 902 Whittecar Ave, Gregory 57533 | (605) 835-8821 |