| Business | Phone |
| City Administrator 723 N Sturgeon St, Montgomery City 63361 | (573) 564-3160 |
| Montgomery City Collector 723 N Sturgeon St, Montgomery City 63361 | (573) 564-2109 |
| Montgomery City Ind Dev Auth 723 N Sturgeon St, Montgomery City 63361 | (573) 564-2712 |
| Montgomery Sewage Treatment 6 Roy Rd, Montgomery City 63361 | (573) 564-2240 |
| Montgomery Sewage Treatment Rr 1, Montgomery City 63361 | (573) 564-2240 |