中部省分為11個縣:
- Gatundu District
- 東基安布縣Kiambu East District
- 西基安布縣Kiambu West District
- 基里尼亞加縣 Kirinyaga District
- 北穆蘭卡縣Muranga North District
- 南穆蘭卡縣Muranga South District
- 北年達魯阿縣 Nyandarua North District
- 南年達魯阿縣Nyandarua South District
- 北尼耶利縣Nyeri North District
- 南尼耶利縣Nyeri South District
- 錫卡縣Thika District