PublicGrades K-5
Muir (John) Elementary School
615 Greystone Drive, Antioch, CA 94509-6990(925) 779-7450
Total Students660
Student/Teacher20.68:1
Math Prof.24.69%
Reading Prof.35.29%
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountyContra Costa
School DistrictAntioch Unified School District
Principal / AdminMichael Flosi(925) 779-7450
Founded1990
Free/Reduced Lunch58.94% Eligible
Acceptance Rate100%
Student Demographics
White8.2%
Hispanic55.8%
Black20.5%
Asian9.2%
Native American0.8%
Pacific Islander0.5%
Two Or More5.2%
Gender Distribution
47.1%
52.9%
Male Female
Students per Grade
Grade 1105
Grade 2101
Grade 3109
Grade 4115
Grade 5100
School Calendar 2026-2027
July 2026
Academic Schedule • 2026-2027
Holiday Event
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Muir (John) Elementary School
Academic Calendar (2026-2027)
July 2026
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August 2026
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September 2026
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October 2026
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November 2026
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December 2026
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January 2027
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February 2027
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March 2027
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April 2027
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May 2027
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June 2027
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Key Dates & Holidays
Independence Day ObservanceJul 3
First Day of SchoolAug 10
Elementary Back to School NightAug 20
Middle School Back to School NightAug 27
High School Back to School NightSep 3
Labor Day HolidaySep 7
New Year's Day HolidayJan 1
Martin Luther King Jr. DayJan 18
Lincoln's Birthday ObservanceFeb 8
President's Day HolidayFeb 15
High School Open HouseMar 18
Good Friday HolidayMar 26
Easter Observed / Spring RecessMar 29
Spring RecessApr 1
Emergency Make Up DayApr 30
Elementary School Open HouseMay 13
Middle School Open HouseMay 20
Emergency Make Up DayMay 28
Memorial Day HolidayMay 31
Last Day of School / Minimum DayJun 8
Juneteenth ObservationJun 18
Minimum DayDec 18
Winter Break (Recess)Dec 21
Christmas Eve and Day HolidaysDec 24
Admission Day/Floating HolidayDec 28
New Year's Eve HolidayDec 31
Veteran's Day ObservanceNov 11
Minimum DayNov 20
Thanksgiving RecessNov 23
Thanksgiving HolidaysNov 26
Key Dates & Holidays
2026-2027Community Reviews
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