Washington residents paid $4,554 to attend the four-year public institution this year $391 more than the $4,163 charged for 2016-17.
Non-residents paid 43.4 percent more than residents this year, or $6,530. Their price tag grew 1.5 percent from $6,436 in 2016-17.
About 98 percent of the school's undergraduate population are Washington residents. And about 2 percent are residents of other states.
Data shows 60 percent of full-time undergraduates who started school in 2015-16 received student financial aid in some form. In all, 375 students received grants or scholarships totaling $2.13 million and 55 students took out student loans totaling more than $233,738.
Including all undergraduates, 2,422 students used grants or scholarships totaling $12.27 million. Another 587 took out $3.31 million in federal student loans.