WSU posted a 3.45 team GPA this past spring.
The 12 signees will join WSU this fall.
Cougars have five teams with perfect single-year scores in 2017-18.
Sophomore Caitlin Tycz earned first team honors while redshirt junior Hanni Leach and seniors Allie Wooden and Elizabeth Stinson earned second team honors, the quartet among 17 Trojans named to the Pac-12's All-Academic teams announced Tuesday.
The Cougars recorded 35 WSU Top-10 times and two school records throughout the season.
Cougars rewrite the WSU Top-10 this season.