The Thompson–Nicola Regional District is a regional district in the Canadian province of British Columbia. The Canada 2021 Census population was 143,680 and the area covers 44,449.49 square kilometres. The administrative offices are in the main population centre of Kamloops, which accounts for 78 percent of the regional district's population. The only other city is Merritt; other municipally-incorporated communities include the District Municipalities of Logan Lake, Barriere and Clearwater and the Villages of Chase, Ashcroft, Cache Creek, Clinton and Lytton, and also the Mountain Resort Municipality of Sun Peaks. The region is named indirectly for the Thompson River by way of the traditional regional names of "the Thompson Country" and "the Nicola Country"; the Nicola Country was named for Chief Nicola and was originally "Nicola's Country", where he held sway; he is also the namesake of that river. The regional district government operates over 125 services including libraries, solid waste management and recycling, community services, emergency and development services, a film commission. The region is unique in Canada as it consistently holds around some of the hottest summer temperatures in the country, while also containing an area around Ashcroft that may be the only arid climate in Canada.

Municipalities

Unincorporated communities

Electoral areas

Demographics

As a census division in the 2021 Census of Population conducted by Statistics Canada, the Thompson-Nicola Regional District had a population of 143,680 living in 59,885 of its 65,065 total private dwellings, a change of NaN% from its 2016 population of 132,663. With a land area of 44347.23 km2, it had a population density of in 2021.

Parks

The regional district contains more than 60 provincial parks. See List of provincial parks of Thompson-Nicola Regional District.