2018 in American television network changes

The following are lists of changes to American television networks, including changes of station affiliations, that occurred in 2018.

Station launches

 * Notes:

Major affiliation changes

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