1. Jammu and Kashmir: This northernmost state of India has a 159 kilometer (99 mile) border with China's Aksai Chin region, which is claimed by both India and China.
2. Himachal Pradesh: This state shares a border with China's Tibet Autonomous Region for about 200 kilometers (124 miles).
3. Uttarakhand: Uttarakhand has a 345-kilometer (214-mile) border with China, primarily along its eastern border with Tibet.
4. Sikkim: Sikkim shares a 220-kilometer (137-mile) border with China, which primarily runs along the northern and eastern borders of the state.
5. Arunachal Pradesh: This northeastern state of India has a 1,126 kilometer (699 mile) border with China, spanning from the easternmost point of India to the tri-junction of India, China, and Myanmar.