| Business | Phone |
| Mason County Animal Control 100 N Broadway, Havana 62644 | (309) 543-6015 |
| Mason County Assessment Ofc 125 N Plum St, Havana 62644 | (309) 543-4775 |
| Mason County Circuit Clerk 125 N Plum St, Havana 62644 | (309) 543-6619 |
| Mason County Computer Dept 125 N Plum St, Havana 62644 | (309) 543-4844 |
| Mason County Coroner 217 N Plum St, Havana 62644 | (309) 543-2843 |
| Mason County Esda 102 W Market St, Havana 62644 | (309) 543-3758 |
| Mason County Etsb 102 W Market St, Havana 62644 | (309) 543-3012 |
| Mason County Recorder 125 N Plum St, Havana 62644 | (309) 543-6661 |