Rinchengang (Tibetan: རིན་ཆེན་སྒང, Wylie: rin chen sgang, THL: rin chen gang, ZYPY: Rinqêngang) or Renqinggang (Chinese: 仁青岗村; pinyin: Rén qīng gǎng cūn) is a town in the Chumbi Valley and the headquarters of the Xia Yadong Township of Yadong County, Tibet region of China. It is in the valley of Amo Chu where the route from Sikkim's Jelep La pass meets Amo Chu. It is also close to the Bhutan–China border (Doklam area), which is currently in dispute. In December 2018, Rinchengang village had a population of around 550 people. The inhabitants are engaged in animal grazing or work as forest rangers. Some also carry supplies to Chinese border troops.

In 2003, the governments of India and China agreed to use Rinchengang as a border trade mart, along with Changgu in Sikkim. It is also the corresponding trade mart for Sherathang.

Rinchengang is in the main Chumbi valley, on the west bank of the Amo Chu river. A stream called Yatung Chu that brings waters from the Jelep La and Nathu La passes on the Sikkim border, joins Amo Chu here. The town has one of the largest tracts of flat land in the Chumbi valley covering around 580 sq km of grasslands and forests. It is also one of the last villages in the Amo Chu valley before the river enters Bhutan.

Being a spacious location and close to both Sikkim and Bhutan, Rinchengang seems to have always played the role of a trading centre. Archibald Campbell, the Deputy Commissioner of Darjeeling, wrote in 1848 that the people of all three countries, Sikkim, Bhutan and Tibet, traded here.

There was a bridge over Amo Chu at Rinchengang, which provided routes into Bhutan on both the banks of the Amo Chu river: the eastern one going via the Charitang valley towards Haa, and the western one going via the Doklam plateau to Sangbay. (See Map 1) From the Doklam plateau, there was also a route to the Dichu basin (Tendu and Sipchu).

In December 1903 Laurence Waddell passed through Rinchengang on his way to Lhasa and described it as follows:

Craggy mountains rise on either side into jagged snow-streaked peaks banded by dark pines, and between, the clear green waters of the Mo river... The meadow here is a quarter of a mile broad, and its turfy terraces, sprinkled with the frosted remains of last year’s wild-flowers... are dotted freely over with fine large houses, two- and three-storeyed in the Swiss chalet style, with widely-projecting eaves and wooden balconies carved and gaudily painted. The village of Rinchengang consists of about forty of these handsome houses, much superior to any native house in Sikhim or even at Darjeeling. They are closely clustered between narrow lanes, and all are picked out in bright colours, giving an air of prosperity and comfort.

Rinchengang was prosperous. Being on the route from the Jelep La pass, it participated in the trade between Tibet and the Indian towns Kalimpong and Darjeeling as well as Sikkim's Gangtok. Indian traders were not allowed beyond the Yatung customs house (Old Yatung). So traders from Rinchengang exploited the gap, leading to their prosperity.