Departments | Auditor | Real Estate | Tax District Codes
| Cities -- Regular Districts | |
| 01001 (pdf) | Mason City Corp/Mason City Schools |
| 02006 (pdf) | Clear Lake Corp/Clear Lake Schools/San Dist |
| 02008 (pdf) | Clear Lake Corp/Ventura Schools/San Dist |
| 02029 (pdf) | Clear Lake Corp/Clear Lake Schools |
| 02083 (pdf) | Clear Lake Corp/Ventura Schools |
| 03010 | Dougherty Corp/Sheffield-Chapin Schools |
| 04012 | Meservey Corp/Meservey Thornton Schools |
| 05014 | Plymouth Corp/North Central Schools |
| 06016 | Rock Falls Corp/Nora Spgs-Rock Falls Schools |
| 07018 | Rockwell Corp/Rockwell-Swaledale Schools |
| 08020 | Swaledale Corp/Rockwell-Swaledale Schools |
| 09022 | Thornton Corp/Meservey-Thornton Schools |
| 10024 (pdf) | Ventura Corp/Ventura Schools |
| 10026 (pdf) | Ventura Corp/Ventura Schools/San Dist |
| 27001 | Nora Springs Corp/Nora Spgs-Rock Falls Schools |
| Cities -- Agricultural Property | |
| 01002 | Mason City Corp/Ag/Mason City Schools |
| 02007 | Clear Lake Corp/Ag/Clear Lake Schools/San Dist |
| 02009 | Clear Lake Corp/Ag/Ventura Schools/San Dist |
| 02030 | Clear Lake Corp/Ag/Clear Lake Schools |
| 02084 | Clear Lake Corp/Ag/Ventura Schools |
| 03011 | Dougherty Corp/Ag/Sheffield-Chapin Schools |
| 04013 | Meservey Corp/Ag/Meservey-Thornton Schools |
| 05015 | Plymouth Corp/Ag/North Central Schools |
| 06017 | Rock Falls Corp/Ag/Nora Spgs-Rock Falls Schools |
| 07019 | Rockwell Corp/Ag/Rockwell-Swaledale Schools |
| 08021 | Swaledale Corp/Ag/Rockwell-Swaledale Schools |
| 09023 | Thornton Corp/Ag/Meservey-Thornton Schools |
| 10025 | Ventura Corp/Ag/Ventura Schools |
| 10027 | Ventura Corp/Ag/Ventura Schools/San Dist |
| Townships | |
| 11034 | Bath Twp/Mason City Schools |
| 11035 | Bath Twp/Rockwell-Swaledale Schools |
| 12036 (pdf) | Clear Lake Twp/Clear Lake Schools |
| 12037 (pdf) | Clear Lake Twp/Clear Lake Schools/San Dist |
| 12038 (pdf) | Clear Lake Twp/Ventura Schools |
| 12039 (pdf) | Clear Lake Twp/Ventura Schools/San Dist |
| 13040 | Dougherty Twp/Rockwell-Swaledale Schools |
| 13041 | Dougherty Twp/Rudd-Rockford-Marble Rock Schools |
| 13042 | Dougherty Twp/Sheffield-Chapin Schools |
| 14043 | Falls Twp/Nora Spgs-Rock Falls Schools |
| 14044 | Falls Twp/North Central Schools |
| 15045 | Geneseo Twp/Rockwell-Swaledale Schools |
| 15046 | Geneseo Twp/Sheffield-Chapin Schools |
| 16047 | Grant Twp/Clear Lake Schools |
| 16048 | Grant Twp/Forest City Schools |
| 16049 | Grant Twp/Ventura Schools |
| 17050 | Grimes Twp/Meservey-Thornton Schools |
| 17051 | Grimes Twp/Ventura Schools |
| 18052 (pdf) | Lake Twp/Clear Lake Schools |
| 18054 (pdf) | Lake Twp/Mason City Schools |
| 19055 | Lime Creek Twp/Mason City Schools |
| 19056 | Lime Creek Twp/North Central Schools |
| 20057 | Lincoln Twp/Clear Lake Schools |
| 20058 | Lincoln Twp/Forest City Schools |
| 20059 | Lincoln Twp/Mason City Schools |
| 20060 | Lincoln Twp/North Central Schools |
| 21061 | Mason Twp/Mason City Schools |
| 22062 | Mount Vernon Twp/Clear Lake Schools |
| 22063 | Mount Vernon Twp/Rockwell-Swaledale Schools |
| 23064 | Owen Twp/Mason City Schools |
| 23065 | Owen Twp/Nora Spgs-Rock Falls Schools |
| 23066 | Owen Twp/Rockwell-Swaledale Schools |
| 23067 | Owen Twp/Rudd-Rockford-Marble Rock Schools |
| 24068 | Pleasant Valley Twp/Meservey-Thornton Schools |
| 24069 | Pleasant Valley Twp/Rockwell-Swaledale Schools |
| 24070 | Pleasant Valley Twp/Sheffield-Chapin Schools |
| 25071 | Portland Twp/Mason City Schools |
| 25072 | Portland Twp/Nora Spgs-Rock Falls Schools |
| 26073 | Union Twp/Clear Lake Schools |
| 26074 | Union Twp/Meservey-Thornton Schools |
| 26075 | Union Twp/Ventura Schools |
