Saint Mark's School first opened for classes in September 1980, founded by Board President William F. "Buzz" Nern. The founders' guiding philosophy was to provide high-quality education in an atmosphere of love and care in which each member of the community was responsible for the well-being of the others.
The school was accredited in 1984 by the Western Association of Schools and Colleges (WASC) and was given full membership in the National Association of Independent Schools (NAIS) and the California Association of Independent Schools (CAIS) under its second Headmaster, John A. Pistel.
Damon Kerby became Saint Mark’s Headmaster in 1987. The school moved to its current site at 39 Trellis Drive in 1991. In 1997, acknowledging the importance of character in education, our school adopted its Seven Pillars of Character. In 1999, Saint Mark's entered into a 30-year lease at the current site with the Dixie School District. In 2002, construction of the new arts and science building and gymnasium was completed.
In 2003, our school adopted its Guiding Principles for a Diverse, Inclusive, and Socially Responsible Community, underlining the school’s deep commitment to its work on diversity, justice, and global citizenship. The board adopted an updated set of principles in 2010.
Since 2000, we have entered into partnerships with schools and organizations in Marin County, South Africa, China, and Costa Rica.
Recognized for its robust curricular programs in technology and media literacy, the school was named a Leading Edge Technology School by NAIS in 2005.
Joe Harvey was appointed the fourth Head of School in 2011. Our school is a nonprofit corporation governed by a Board of Trustees. It is an independent, nonreligious K-8 school located in the residential area of Terra Linda in San Rafael, California.
On May 23, 2014, the school announced that it would change its name to Mark Day School, effective July 1, 2014.