Subregions- Andhra Pradesh-Chhattisgarh border region, India
 - Andhra Pradesh, India
- Andhra Pradesh-Tamil Nadu border region, India
- Arunachal Pradesh, India
- Assam, India
- Assam-Nagaland-Manipur region, India
- Assam - Nagaland region, India
- Bangladesh
- Bay of Bengal
- Bhutan
- Bihar, India
- Bihar-Jharkhand border region, India
- Chhattisgarh, India
- Chhattisgarh-Jharkhand border region, India
- Chhattisgarh-Jharkhand-Orissa border region, India
- Chhattisgarh-Orissa border region, India
- China-Laos-Vietnam border region
- China-Vietnam border region
- Chongqing, China
- Chongqing-Guizhou border region, China
- Chongqing-Hubei border region, China
- eastern Kashmir
- eastern Sichuan, China
- eastern Xizang
- eastern Xizang-India border region
- Goa-Karnataka border region, India
- Gujarat, India
- Gujarat-Madhya Pradesh border region, India
- Gujarat-Maharashtra border region, India
- Haryana - Delhi region, India
- Haryana-Delhi-Uttar Pradesh region, India
- Haryana, India
- Haryana - Punjab region, India
- Haryana - Uttaranchal region, India
- Himachal Pradesh, India
- India-Bangladesh border region
- Jharkhand, India
- Jharkhand-Orissa-West Bengal region, India
- Jharkhand region, India
- Jharkhand-West Bengal border region, India
- Karnataka-Andhra Pradesh border region, India
- Karnataka, India
- Karnataka-Tamil Nadu border region, India
- Kashmir-India border region
- Kashmir-Xizang border region
- Kerala, India
- Kerala-Karnataka border region, India
- Kerala-Karnataka-Tamil Nadu border region, India
- Kerala-Tamil Nadu border region, India
- Madhya Pradesh-Chhattisgarh border region, India
- Madhya Pradesh, India
- Madhya Pradesh-Maharashtra border region, India
- Madhya Pradesh region, India
- Maharashtra-Andhra Pradesh border region, India
- Maharashtra-Chhattisgarh border region, India
- Maharashtra, India
- Maharashtra-Karnataka border region, India
- Meghalaya - Assam region, India
- Meghalaya, India region
- near the coast of Andhra Pradesh, India
- near the coast of Bangladesh
- near the coast of Goa, India
- near the coast of Gujarat, India
- near the coast of Karnataka, India
- near the coast of Kerala, India
- near the coast of Maharashtra, India
- near the coast of Orissa, India
- near the coast of Tamil Nadu, India
- near the coast of West Bengal, India
- Nepal
- Nepal-India border region
- Orissa, India
- Orissa region, India
- Palk Strait
- Punjab-Chandigarh-Haryana region, India
- Punjab-Himachal Pradesh border region, India
- Punjab, India
- Qinghai-Xizang-Sichuan border region
- Rajasthan-Gujarat border region, India
- Rajasthan-Haryana border region, India
- Rajasthan, India
- Rajasthan-Madhya Pradesh border region, India
- Rajasthan-Uttar Pradesh border region, India
- Shaanxi-Sichuan border region, China
- Sichuan-Chongqing border region, China
- Sichuan-Gansu border region, China
- Sichuan-Guizhou border region, China
- Sichuan-Yunnan border region, China
- Sichuan-Yunnan-Guizhou region, China
- Sikkim, India
- Tamil Nadu, India
- Tripura, India region
- Uttaranchal, India
- Uttaranchal-Uttar Pradesh border region, India
- Uttar Pradesh-Bihar border region, India
- Uttar Pradesh-Bihar-Jharkhand border region, India
- Uttar Pradesh, India
- Uttar Pradesh-Madhya Pradesh border region, India
- West Bengal, India
- western Sichuan, China
- western Xizang
- western Xizang-India border region
- Xinjiang-Xizang border region
- Xizang-India-Myanmar border region
- Xizang-Nepal border region
- Xizang-Qinghai border region
- Xizang-Sichuan border region
- Yunnan, China
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