| Business | Phone |
| Family Independence Agency 535 Russell Rd, Hart 49420 | (231) 873-7251 |
| Planned Parenthood 3986 N Oceana Dr, Hart 49420 | (231) 873-4825 |
| Progressions Work Ctr 26 N State St, Hart 49420 | (231) 873-5170 |
| Oceana County Administrator 100 S State St, Hart 49420 | (231) 873-4835 |
| Oceana County Building Insp 314 S State St, Hart 49420 | (231) 873-5355 |
| Oceana County Drain Comm 100 N State St, Hart 49420 | (231) 873-3887 |
| Oceana County Ems 3669 N Oceana Dr, Hart 49420 | (231) 873-8241 |
| Oceana County Epsdt 3986 N Oceana Dr, Hart 49420 | (231) 873-2625 |
| Oceana County Equalization 100 S State St, Hart 49420 | (231) 873-4609 |
| Oceana County Protective Svc 4081 W Polk Rd, Hart 49420 | (231) 873-2106 |
| Oceana County Register-Deeds 100 S State St, Hart 49420 | (231) 873-4158 |
| Oceana County Road Commission 3501 W Polk Rd, Hart 49420 | (231) 873-4226 |
| Oceana County Stock Room Dept 3501 W Polk Rd, Hart 49420 | (231) 873-3717 |
| Oceana County Surveyor 100 S State St, Hart 49420 | (231) 873-4350 |
| Oceana County Surveyor 210 Johnson St E, Hart 49420 | (231) 873-4350 |