| Business | Phone |
| Chautauqua County Finance Dept 3 N Erie St, Mayville 14757 | (716) 753-4223 |
| Chautauqua County Taxation Div 3 N Erie St, Mayville 14757 | (716) 753-4221 |
| County Comptroller 3 N Erie St # 131, Mayville 14757 | (716) 753-4433 |
| County Tax Map 1 N Erie St, Mayville 14757 | (716) 753-4263 |