The West Coast Avengers were created as an expansion of the main Avengers team, when The Vision appointed Hawkeye as the West Coast chair in Avengers vol. 1 #243. Active team members, as of December 2018,[1] are highlighted in bold below.
^Kelly Thompson (w), Daniele Di Nicuolo (p). West Coast Avengers, vol. 3, no. 6 (December 2018). Marvel Comics.