Archie Williams High

Archie Williams High, a mid-sized senior high in San Anselmo, California, operated by Tamalpais Union High, hosts 1,141 students, covering grades 9 through 12. Compared to the state average of about 838 students per school, that is 36% larger than typical.

Across the 5 schools in Tamalpais Union High (4,503 students total), Archie Williams High accounts for its share of the district's footprint.

Demographically, Archie Williams High shows that the largest single group is White, at 74% of enrollment. The remainder comes out to 15% Hispanic, 8% multiracial.

On the resource side, Archie Williams High records 63 full-time-equivalent teachers, putting the student-to-teacher ratio at about 18.0:1. The state averages about 18.2:1, putting this campus right in line with peers. Roughly 10% of students at Archie Williams High qualify for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. By comparison, Marin County runs at roughly 35%, so the school's eligibility rate is somewhat below the surrounding baseline.

Adjusting for the school's free-and-reduced-lunch share, Archie Williams High is in the bottom 10% of California public schools. The BeatsExpectations model predicts schools with this FRL share to land around 73.3%; Archie Williams High posts 52.6%, -20.7 points below that line.

Around the school, ACS estimates for Marin County put the typical household earns roughly $149,091 per year, about 61% of the adult population holds a bachelor's degree or above, and the poverty rate sits near 4%. Across Marin County's 75 public schools (combined enrollment of about 29,867 students), Archie Williams High is one campus in the mix.

Brookside Elementary is the nearest neighboring public school, about 0.5 miles from this campus. 8 of the 8 nearest public schools sit inside a five-mile radius. Among the 8 schools in that immediate cluster with test data (this one included), Archie Williams High ranks 8th on composite proficiency, below the local average of 73.1%.

Archie Williams High operates from a commuter-belt location.

Looking at the recent track record. Over the past 7-year window, the student count contracted 5%: 1,203 students in 2018 compared to 1,141 in 2025.

In the discussion threads here, recent activity here tends to focus on pickup logistics, teacher feedback, and after-school programs. The community welcomes input from current and former families.