We describe the extent and predictors of staffing challenges faced by school districts in Washington state throughout the 2021-22 school year using data collected from job posting websites for districts representing more than 98% of students in the state. These data suggest that school districts in the state faced considerable challenges filling paraeducator and, to a lesser extent, teaching positions at the beginning of the school year. When we focus specifically on teachers, we find that teacher staffing challenges were far more pronounced for special education positions and in schools serving more students of color, less pronounced for elementary positions, and highly correlated with teacher attrition from these types of positions after the prior school year. Accounting for these relationships, districts posted more teaching positions later in the school year when they had increasing student enrollments and received more Elementary and Secondary School Emergency Relief funds than nearby districts.