Keystone in Antioch, CA, serves grades 4 through 8 within an urban community setting.
The nonsectarian private school was founded in 1970 and currently enrolls 4 students.
Keystone maintains a student–teacher ratio of 4:1 with one full–time teacher on staff.
The school's grade span includes upper elementary and middle school levels, providing education for a small student body.
As a California nonsectarian K–8 private school, Keystone operates in a large town environment near several other Antioch–area schools.
Quick Facts (2026)
- Grades: 4-8
- Enrollment: 4 students
- Application Deadline: None / Rolling
- Source: National Center for Education Statistics (NCES)
School Overview
Religious Affiliation
Grades Offered
Grades 4-8
Year Founded
1970
School Calendar
Student Body
Total Students
4 students
Student Body Type
Co-ed
Students by Grade
Academics and Faculty
Total Classroom Teachers
1 teacher
Student-Teacher Ratio
4:1
National avg.: 11:1
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Application URL
Source: National Center for Education Statistics (NCES)
Frequently Asked Questions
When is the application deadline for Keystone?
The application deadline for Keystone is rolling (applications are reviewed as they are received year-round).
Related Schools
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People that viewed Keystone also viewed these schools: I AM School, The Springstone School, Northstar School, Stanford Online High School and Peace Terrace Academy.
The nearest high school to Keystone is Spectrum Center- Antioch Campus (1.5 miles away)
The nearest elementary school is Hilltop Christian School (0.8 miles away)
The nearest preschool is Lone Tree Way KinderCare (0.5 miles away)
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School
Location
Miles
Quick Facts
I AM School ![I AM School Photo - Founded in 1936, the "I AM" School, Inc. is a private, non-profit 501(c) registered religious school that is established on the christian-based tenets of the "I AM" Religious Activity. The core element of the "I AM" School's curriculum involves daily instruction in the "I AM" Activity Religious beliefs.]( "I AM School Photo - Founded in 1936, the \"I AM\" School, Inc. is a private, non-profit 501(c) registered religious school that is established on the christian-based tenets of the \"I AM\" Religious Activity. The core element of the \"I AM\" School's curriculum involves daily instruction in the \"I AM\" Activity Religious beliefs.")
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The Springstone School ![The Springstone School Photo - The Springstone School Main Hall.]( "The Springstone School Photo - The Springstone School Main Hall.")
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Northstar School
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(510) 397-1501
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Stanford Online High School
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Peace Terrace Academy
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