Keystone (2026 Profile)

Home > California > Contra Costa County > Antioch

Keystone

600 Alumrock Drive
Antioch, CA 94509

Tel: (925) 706-7086

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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 studentâ€“teacher ratio of 4:1 with one fullâ€“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 Kâ€“8 private school, Keystone operates in a large town environment near several other Antiochâ€“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

Nonsectarian

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.:

Tuition and Acceptance Rate

Admission Deadline

None / Rolling

Application URL

Source: National Center for Education Statistics (NCES)

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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).

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Quick Facts (2026)

Grades: 4-8
Enrollment: 4 students
Application Deadline: None / Rolling
Source: National Center for Education Statistics (NCES)

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Did You Know?

The average private school tuition in Antioch, CA is $10,953 for elementary schools (read more about average private school tuition across the country).