Rio Americano High School, colloquially known as Rio, is a public high school in Arden-Arcade, California, just outside Sacramento, serving students in grades 9 through 12 as part of the San Juan Unified School District.
Serving 1,891 students in grades 9-12, Rio Americano High School ranks in the top 30% of all schools in California for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 41% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 59% (which is higher than the California state average of 47%).
The student-teacher ratio of 24:1 is higher than the California state level of 21:1.
Minority enrollment is 43% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,891 students
- Student-Teacher Ratio: 24:1
- Minority Enrollment: 43%
- Graduation Rate: 89% (Top 50% in CA)
- Overall Testing Rank: Top 30%
- Math Proficiency: 41% (Top 50%)
- Reading Proficiency: 59% (Top 30%)
- Science Proficiency: 36% (Top 50%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
School Overview
Rio Americano High School's student population of 1,891 students has stayed relatively flat over five school years.
The teacher population of 79 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,891 students
Total Classroom Teachers
79 teachers
Year Founded
1963
School Calendar
School Rankings
Rio Americano High School ranks within the top 30% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Rio Americano High School is 0.62, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#2571 out of 9523 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
41%
34%
Reading/Language Arts Test Scores (% Proficient)
59%
47%
Science Test Scores (% Proficient)
36%
29%
Student-Teacher Ratio
24:1
21:1
American Indian
n/a
1%
Asian
13%
12%
Hispanic
18%
56%
Black
4%
5%
White
57%
20%
Hawaiian
n/a
n/a
Two or more races
8%
6%
All Ethnic Groups
Graduation Rate
89%
87%
Eligible for Free Lunch
39%
54%
Eligible for Reduced Lunch
1%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Rio Americano High School's ranking?
Rio Americano High School is ranked #2571 out of 9,523 schools, which ranks it among the top 30% of public schools in California.
What schools are Rio Americano High School often compared to?
Rio Americano High Schoolis often viewed alongside schools like El Camino Fundamental High School, Mira Loma High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
41% of students have achieved math proficiency (compared to the 34% CA state average), while 59% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Rio Americano High School?
The graduation rate of Rio Americano High School is 89%, which is higher than the California state average of 87%.
How many students attend Rio Americano High School?
1,891 students attend Rio Americano High School.
What is the racial composition of the student body?
57% of Rio Americano High School students are White, 18% of students are Hispanic, 13% of students are Asian, 8% of students are Two or more races, and 4% of students are Black.
What is the student-teacher ratio of Rio Americano High School?
Rio Americano High School has a student ration of 24:1, which is higher than the California state average of 21:1.
What grades does Rio Americano High School offer ?
Rio Americano High School offers enrollment in grades 9-12
What school district is Rio Americano High School part of?
Rio Americano High School is part of San Juan Unified School District.
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