Total Students1,951
Student/Teacher23.01:1
Math Prof.20.17%
Reading Prof.46.38%
Graduation Rate93.2%
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountyVentura
School DistrictOxnard Union High School District
Principal / AdminGary Peterson(805) 278-5500
Founded1980
Free/Reduced Lunch72.58% Eligible
Acceptance Rate100%
Student Demographics
White4.4%
Hispanic87.1%
Black1%
Asian4.7%
Pacific Islander0.1%
Two Or More2.2%
Gender Distribution
51.1%
48.5%
Male Female
Students per Grade
Grade 9491
Grade 10459
Grade 11525
Grade 12476
School Calendar 2026-2027
July 2026
Academic Schedule • 2026-2027
Holiday Event
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Rio Mesa High 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 ObservedJul 3
First Day of School Fall SemesterAug 12
Labor Day HolidaySep 7
End of First Grading PeriodOct 9
Start of Second Grading PeriodOct 13
Veterans Day ObservedNov 11
Thanksgiving Week BreakNov 23
End Fall Semester and Second QuarterDec 18
Winter RecessDec 21
Begin Spring Semester and Third QuarterJan 5
Martin Luther King Jr. Day HolidayJan 18
February Break WeekFeb 15
End of Third Grading PeriodMar 19
Start of Fourth Grading PeriodMar 22
Spring Break (First Part)Mar 29
Spring Break (Conclusion)Apr 1
Memorial Day ObservedMay 31
End Spring Semester and Fourth QuarterJun 2
Juneteenth HolidayJun 18
Key Dates & Holidays
2026-2027Community Reviews
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