Print Friendly, PDF & Email

How did Sikkim become a part of India?

GS Paper 2:

Topics Covered: Indian Constitution and historical underpinnings.



The Statehood Day of Sikkim was observed on 16th May, 2022.

  • It was on May 16, 1975 that Sikkim became the 22nd state of the Union of India.


How did the Himalayan state come to join the Indian Union?

  1. Beginning with Phuntsog Namgyal, the first chogyal (monarch), the Namgyal dynasty ruled Sikkim until 1975.
  2. In 1950, three years after India’s independence, a treaty was signed between Sikkim and the Republic of India. Under the agreement, the former continued its status as a ‘protectorate’ state within the Union of India.
  3. In September 1974, the Chogyals called for a referendum. In the subsequent referendum, as many as 97.5 percent participants voted in favour of joining India, while 2.45 percent voted against the proposal.
  4. On May 15, 1975, then-President of India, Fakhruddin Ali Ahmed, signed a constitutional amendment, and, a day later, Sikkim became the 22nd state of India; the position of the Chogyal was abolished as well.


Related facts:

  • During the Anglo-Nepalese war/the Gorkha war (1814 to 1816), Sikkim allied with the East India Company. The Company won and restored to Sikkim some of the territories that Nepal had forcibly taken from it in 1780.
  • Sikkim became a British Protectorate under the Treaty of Tumlong signed in March, 1861.


Current Affairs


Insta Curious:

Do you know about the Sikkim- Tibet Convention of 1890? Reference: read this.



Prelims Link:

  1. About Sikkim.
  2. Location.
  3. Namgyal dynasty.
  4. Anglo-Nepalese war.
  5. Treaty of Tumlong.

Mains Link:

Discuss how and why Sikkim became a part of India?


Q.2) Consider the following statements:

  1. Nepal became a British Protectorate under the Treaty of Tumlong signed in March, 1861.
  2. In the Anglo-Nepalese war Sikkim supported Nepal.

Choose the correct answer using the codes given below:

  1. 1 only
  2. 2 only
  3. Both
  4. None  

Sources: Indian Express.