Nicasio School serves approximately 50-60 students in grades TK-8. Students learn in multi-grade classrooms with highly skilled teachers and support staff who prepare them for transition to high school and life outside of Nicasio. While many graduating 8th graders attend Sir Francis Drake High School in San Anselmo, many others attend private high schools in Marin County and San Francisco.

Nestled in the heart of Marin County, California, Nicasio School belongs to one of the few remaining single-school public school districts in Marin. The district itself was established in 1866 with the first Nicasio schoolhouse constructed in 1867.