Competitive exams like SSC, Bank exams, Railways and State Government exams, India all important states and their official languages are important. Here i am giving 25 important list.
| Andhra Pradesh | Telugu |
| Arunachal Pradesh | English |
| Assam | Assamese |
| Bihar | Hindi |
| Chhattisgarh | Hindi |
| Goa | Konkani |
| Gujarat | Gujarati |
| Haryana | Hindi |
| Himachal Pradesh | Hindi |
| Jharkhand | Hindi |
| Karnataka | Kannada |
| Kerala | Malayalam |
| Madhya Pradesh | Hindi |
| Maharashtra | Marathi |
| Manipur | Meitei (Manipuri) |
| Meghalaya | English |
| Mizoram | Mizo, English |
| Nagaland | English |
| Odisha | Odia |
| Punjab | Punjabi |
| Rajasthan | Hindi |
| Sikkim | English, Nepali |
| Tamil Nadu | Tamil |
| Telangana | Telugu |
| Tripura | Tripura |
| Uttar Pradesh | Hindi |
| Uttarakhand | Hindi |
| West Bengal | Bengali |
