- Animal Husbandry And Veterinary Service Department
- Building And Housing Department
- Commercial Taxes Division,FRED Department
- Cooperation Department
- Central Information Commission Department
- Cultural Affairs And Heritage Department
- Commerce And Industries Department
- Department Of Sports And Youth affairs Department
- Directorate of Technical EducationHRDD Department
- Ecclesiastical Affairs Department
- Energy And Power Department
- Excise Department
- Election Department
- Food Security And Agriculture Development Department
- Forest Environment And Wildlife Department
- Finance, Revenue & Expenditure Department
- Health Department
- Human Resource Development Department
- Information And Public Relations Department
- Sikkim Legislative Assembly Department
- Irrigation And Flood Control Department
- Land Revenue & Disaster Management Department
- Mines and Geology Department
- Roads And Bridges Department
- Raj Bhavan Department
- Rural Management and Development Department
- Science & Technology Department
- Sikkim Public Service Commission Department
- State Election Commission Department
- Sikkim Vigilance Police Department
- Sikkim Police Department
- Sikkim Archives, DIT Department
- Sikkim Information Commission Department
- Social Justice Empowerment And Welfare Department
- SIMFED Department
- Tourism Department
- Urban Dev & Housing Department
- Water Security & PHE Department
- Transport Department