Sidkeong Namgyal

{{Use Indian English|date=September 2016}}

{{Use dmy dates|date=September 2016}}

{{About|the king of Sikkim from 1863 to 1874|the Sikkim king in 1914|Sidkeong Tulku Namgyal}}

{{Infobox royalty

|name = Sidkeong Namgyal

|image = Chogyal Sidkeong Namgyal.jpg

|image_size =

|caption = Chogyal Sidkeong Namgyal in Darjeeling

|reign = 1863 – 1874

|succession = Chogyal of Sikkim

|predecessor = Tsugphud Namgyal

|successor = Thutob Namgyal

|issue =

|house = Namgyal dynasty

|father = Tsugphud Namgyal

|mother =

|birth_date = 1819

|birth_place =

|death_date = 1874

|death_place =

|burial_date =

|burial_place =

|signature =

|religion = Buddhism

|spouse =

}}

Sidkeong Namgyal (Sikkimese: {{bo-textonly|སྲིད་སཀྱོང་རྣམ་རྒྱལ་}}; Wylie: srid skyong rnam rgyal) (1819–1874) was king of Sikkim from 1863 to 1874. He was son of Tsugphud Namgyal and was succeeded by his half-brother Thutob Namgyal.Rao, P. Raghunadha (1978). Sikkim, the Story of Its Integration with India. Cosmo[https://books.google.com/books?id=L7gIVNzkN2YC&dq=Chakdor+Namgyal&pg=PA80 Sikkim: Past and Present edited by H. G. Joshi]

His mother was the second wife of his father, a Tibetan lady, sister of the Tashi Lama.{{cn|date=June 2020}}

It was Sidkeong Namgyal who signed the Treaty of Tumlong with the British in 1861, his father having abdicated rather than return to surrender to the force of Sir Ashley Eden.[https://himalaya.socanth.cam.ac.uk/collections/journals/bot/pdf/bot_2009_02_02.pdf 1861 history