Serving 505 students in grades Kindergarten-5, River Mill Elementary School ranks in the bottom 50% of all schools in Oregon for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 27% (which is lower than the Oregon state average of 31%). The percentage of students achieving proficiency in reading/language arts is 39% (which is lower than the Oregon state average of 44%).
The student-teacher ratio of 19:1 is higher than the Oregon state level of 17:1.
Minority enrollment is 26% of the student body (majority Hispanic), which is lower than the Oregon state average of 42% (majority Hispanic).
Quick Facts (2026)
- Grades: Kindergarten-5
- Enrollment: 505 students
- Student-Teacher Ratio: 19:1
- Minority Enrollment: 26%
- Overall Testing Rank: Bottom 50% in OR
- Math Proficiency: 27% (Top 50%)
- Reading Proficiency: 39% (Btm 50%)
- Science Proficiency: 25-29% (Btm 50%)
- Source: National Center for Education Statistics (NCES), OR Dept. of Education
School Overview
River Mill Elementary School's student population of 505 students has grown by 16% over five school years.
The teacher population of 27 teachers has grown by 17% over five school years.
Grades Offered
Grades Kindergarten-5
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
505 students
Gender %
Total Classroom Teachers
27 teachers
Year Founded
1970
School Calendar
School Motto
Every Student. Every Day. Whatever It Takes!
School Rankings
River Mill Elementary School ranks within the bottom 50% of all 1,174 schools in Oregon (based off of combined math and reading proficiency testing data).
The diversity score of River Mill Elementary School is 0.42, which is less than the diversity score at state average of 0.60. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#665 out of 1174 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
27%
31%
Reading/Language Arts Test Scores (% Proficient)
39%
44%
Science Test Scores (% Proficient)
25-29%
30%
Student-Teacher Ratio
19:1
17:1
American Indian
1%
1%
Asian
n/a
4%
Hispanic
17%
26%
Black
1%
3%
White
74%
58%
Hawaiian
n/a
1%
Two or more races
7%
7%
All Ethnic Groups
Eligible for Free Lunch
49%
51%
Eligible for Reduced Lunch
4%
2%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), OR Dept. of Education
Frequently Asked Questions
What is River Mill Elementary School's ranking?
River Mill Elementary School is ranked #665 out of 1,174 schools, which ranks it among the bottom 50% of public schools in Oregon.
What percent of students have achieved state testing proficiency in math and reading?
27% of students have achieved math proficiency (compared to the 31% OR state average), while 39% of students have achieved reading proficiency (compared to the 44% OR state average).
How many students attend River Mill Elementary School?
505 students attend River Mill Elementary School.
What is the racial composition of the student body?
74% of River Mill Elementary School students are White, 17% of students are Hispanic, 7% of students are Two or more races, 1% of students are American Indian, and 1% of students are Black.
What is the student-teacher ratio of River Mill Elementary School?
River Mill Elementary School has a student ration of 19:1, which is higher than the Oregon state average of 17:1.
What grades does River Mill Elementary School offer ?
River Mill Elementary School offers enrollment in grades Kindergarten-5 (Supplemental Virtual).
What school district is River Mill Elementary School part of?
River Mill Elementary School is part of Estacada School District 108.
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