The Lillooet Land District is one of the 59 cadastral subdivisions of British Columbia, which were created by the Lands Act of the Colony of British Columbia in 1859, defined as "a territorial division with legally defined boundaries for administrative purposes". The land district's boundaries came to be used as the boundary of the initial Lillooet riding for the provincial Legislature from 1871, when the colony became a province. In addition to use in descriptions of land titles and lot surveys, the Land District was also the basis of the Lillooet Mining District.
Included in the Land District are the historical region known as the Lillooet Country, including the Pemberton Valley, and the southeast Chilcotin and South Cariboo areas. Major landforms in the land district include the Pemberton Icecap and the Lillooet Icecap.
Municipalities within the land district are Pemberton, Lillooet, 100 Mile House and Clinton. Other communities include D'Arcy, Shalalth, Seton Portage, Fountain, Pavilion, Gold Bridge, Bralorne, Jesmond, and 70 Mile House.
To the south, the Lillooet Land District borders with the New Westminster Land District, on the west with the Sayward Land District and Coast Land District Range 1, on the north with the Cariboo Land District, and on the east and southeast, the Kamloops Division, Yale Land District.