Selkup is the group of languages of the Selkups, belonging to the Samoyedic group of the Uralic language family. It is spoken by some 600 people (2022 est.) in the region between the Ob and Yenisei Rivers (in Siberia). The language name Selkup comes from the Russian селькуп, based on the native name used in the Taz dialect, шӧльӄумыт әты (šöľqumyt əty lit. 'forest-man language'). Different dialects use different native names.

Selkup is fractured in an extensive dialect continuum whose ends are no longer mutually intelligible. The three main varieties are the Taz (Northern) dialect (тазовский диалект, tazovsky dialekt), which became the basis of the Selkup written language in the 1930s, Tym (Central) dialect (тымский диалект, tymsky dialekt), and Ket dialect (кетский диалект, ketsky dialekt). It is not related to the Ket language.

Some have proposed to split Selkup into two different languages, termed Northern Selkup and Southern Selkup. According to the Endangered Languages Project, the differences between dialects are "comparable to those between, for instance, Ket, Yug, and Pumpokol".