2021 in American television

In American television in 2021, notable events include television show debuts, finales, and cancellations; channel launches, closures, and re-brandings; stations changing or adding their network affiliations; and information about controversies and carriage disputes.

Shows returning in 2021
The following shows returned with new episodes after being canceled or having ended their run previously:

Entering syndication in 2021
A list of programs (current or canceled) that have accumulated enough episodes (between 65 and 100) or seasons (three or more) to be eligible for off-network syndication and/or basic cable runs.

Stations changing network affiliations

 * This section outlines affiliation changes involving English and Spanish networks (ABC, NBC, CBS, Fox, PBS, The CW, Univision, etc.), and format conversions involving independent stations. Digital subchannels are mentioned if the prior or new affiliation involves a major English and Spanish broadcast network or a locally programmed independent entertainment format.