Tharaka Nithi County has three (3) constituencies divided into fifteen (15) electoral wards. Below is a list of all the consituencies in Tharaka Nithi County, Wards in each ward and number of registered voters.
| REGISTERED VOTERS PER COUNTY ASSEMBLY WARD FOR THE 2022 GENERAL ELECTION | ||||||
| County Code |  County Name | Const Code |  Const. Name | CAW Code |  CAW Name |  Registered Voters |
| 013 | Â THARAKA – NITHI | 060 | Â MAARA | 0296 | Â MITHERU | 10,862 |
| 013 | Â THARAKA – NITHI | 060 | Â MAARA | 0297 | Â MUTHAMBI | 12,753 |
| 013 | Â THARAKA – NITHI | 060 | Â MAARA | 0298 | Â MWIMBI | 15,145 |
| 013 | Â THARAKA – NITHI | 060 | Â MAARA | 0299 | Â GANGA | 12,691 |
| 013 | Â THARAKA – NITHI | 060 | Â MAARA | 0300 | Â CHOGORIA | 21,797 |
| 013 | Â THARAKA – NITHI | 061 | Â CHUKA/IGAMBANG’OMBE | 0301 | Â MARIANI | 10,573 |
| 013 | Â THARAKA – NITHI | 061 | Â CHUKA/IGAMBANG’OMBE | 0302 | Â KARINGANI | 19,043 |
| 013 | Â THARAKA – NITHI | 061 | Â CHUKA/IGAMBANG’OMBE | 0303 | Â MAGUMONI | 22,846 |
| 013 | Â THARAKA – NITHI | 061 | Â CHUKA/IGAMBANG’OMBE | 0304 | Â MUGWE | 15,913 |
| 013 | Â THARAKA – NITHI | 061 | Â CHUKA/IGAMBANG’OMBE | 0305 | Â IGAMBANG’OMBE | 16,299 |
| 013 | Â THARAKA – NITHI | 062 | Â THARAKA | 0306 | Â GATUNGA | 13,891 |
| 013 | Â THARAKA – NITHI | 062 | Â THARAKA | 0307 | Â MUKOTHIMA | 13,297 |
| 013 | Â THARAKA – NITHI | 062 | Â THARAKA | 0308 | Â NKONDI | 9,543 |
| 013 | Â THARAKA – NITHI | 062 | Â THARAKA | 0309 | Â CHIAKARIGA | 18,715 |
| 013 | Â THARAKA – NITHI | 062 | Â THARAKA | 0310 | Â MARIMANTI | 18,564 |