There are a total of 13 Ministries within the executive arm of government who carry out different roles or responsibilities in the conduct of government business.

The Ministries, including offices within government are as follows:

1. Office of the President (OB)
2. Public Service Office (PSO)
3. Kiribati Police Service and Prison (KPSP)
4. Ministry of Foreign Affairs and Immigration (MFAI)
5. Ministry of Fisheries and Marine Resources Development (MFMRD)
6. Ministry of Internal Affairs (MIA)
7. Ministry of Finance and Economic Development (MFED)
8. Ministry of Labour and Human Resources Development (MLHRD)
9. Ministry of Public Works and Utilities (MPWU)
10. Ministry of Information, Communications and Transport (MICT)
11. Ministry of Health and Medical Services (MHMS)
12. Ministry of Education (ME)
13. Ministry of Commerce, Industry and Cooperatives (MCIC)
14. Ministry of Environment, Lands and Agriculture Development (MELAD)
15. Ministry of Line and Phoenix Islands Development (MLPID)
16. Ministry of Women, Sports and Social Welfare (MWSSW)
17. Office of the Attorney General (OAG)

The roles or responsibilities of each Ministry/Office differ from each other but collectively play a part in the overall conduct of government business.