The Stʼatʼimc (Lillooet pronunciation: [ˈʃt͡ɬʼæt͡ɬʼemx]), also known as the Lillooet (/ˈlɪluɛt/), St̓át̓imc, or Stl'atl'imx (/slætˈliːəm/), are an Interior Salish people located in the southern Whale Mountains and Fraser Canyon region of the Interior of the Canadian province of British Columbia.Stʼatʼimc culture displayed many features typical of Northwest Coast peoples: the potlatch, clan names, mythology, prestige afforded the wealthy and generous, and totem poles in some communities, especially in the Lil'wat First Nation (Lil'wat7ul), whose tribal lands and trade routes in the Whistler Valley and Green River Valley overlapped with those of the Squamish First Nation, a Coast Salish people.

In Pavilion (Tsk'wáylacw), a mainly ethnically and linguistically Secwepemc settlement in the 19th century, since the beginning of the 20th century this community speaks usually Stʼatʼimcets, but their particular dialect is a hybrid of Stʼatʼimcets and Secwepemctsin, because there had been many mixed marriages between Secwepemc and Stʼátʼimc, know forming the Tsk'weylecw'mc or Pavilion Indian Band.

They had several types of dwellings—long plank houses, winter earthlodges, and summer bark- or mat-covered lodges, not unlike those at the Keatley Creek Archaeological Site.

Salmon and other fish were the basis of the economy, and numerous animals (bear, sheep, caribou, deer, and small mammals) were hunted and trapped, and berries and fruit were gathered.

The declaration of the Lillooet Tribe was made in 1911 in Spences Bridge and is the nation's declaration of ownership over lands that had been seized by non-native settlers at Seton Portage at the onset of the 20th century, and is considered a general statement of principle regarding ownership of all traditional territories of the Stʼatʼimcets-speaking peoples.