Cinnabar Elementary

Cinnabar Elementary, a minimally staffed elementary campus in Petaluma, California, run under Cinnabar Elementary, instructs 20 students, covering grade K. Compared to the state average of about 465 students per school, that is 96% leaner than typical.

Cinnabar Elementary runs 2 schools in total, collectively educating 176 students. Cinnabar Elementary is one of those campuses.

On demographics, Cinnabar Elementary records that 75% of the student body identifies as Hispanic. Beyond that, the school shows 20% White, 5% multiracial. That is meaningfully more Hispanic than the county at large, where the share is closer to 30%.

Looking at school resources, Cinnabar Elementary logs 1 full-time-equivalent teachers, putting the student-to-teacher ratio at about 20.0:1. That figure is tighter than the state norm's 22.3:1 average. Roughly 65% of students at Cinnabar Elementary qualify for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. That share is north of Sonoma County's rate of about 51%.

In the broader community, community-level numbers for Sonoma County indicate median household income runs about $104,674, about 39% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 5%. Across Sonoma County's 184 public schools (combined enrollment of about 63,389 students), Cinnabar Elementary is one campus in the mix.

Cinnabar Charter is the nearest neighboring public school, about 0.0 miles from this campus. Within five miles, there are 8 other public schools.

Cinnabar Elementary operates from a residential location.

Looking at the recent track record. Cinnabar Elementary's enrollment has ticked up 33% since 2018, when it stood at 15 (now 20). Hispanic enrollment moved from 93% to 75% across the same window. Class-load math has rose: from 15.0:1 in 2018 to 20.0:1 in 2025.

Inside the community feed, recent activity here tends to focus on science fair prep, picture-day reminders, and bus-route questions. Posting is open to anyone connected to the school.