Timberline High School is a three-year public secondary school in Boise, Idaho. Opened in August 1998, it is the fourth and newest traditional high school in the Boise School District, serving its southeast portion.
Serving 1,391 students in grades 10-12, Timberline High School ranks in the top 20% of all schools in Idaho for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 54% (which is higher than the Idaho state average of 42%). The percentage of students achieving proficiency in reading/language arts is 72% (which is higher than the Idaho state average of 55%).
The student:teacher ratio of 20:1 is higher than the Idaho state level of 17:1.
Minority enrollment is 24% of the student body (majority Hispanic), which is lower than the Idaho state average of 27% (majority Hispanic).
Quick Stats (2025)
- Grades: 10-12
- Enrollment: 1,391 students
- Student:Teacher Ratio: 20:1
- Minority Enrollment: 24%
- Graduation Rate: 89% (Top 30% in ID)
- Overall Testing Rank: Top 20%
- Math Proficiency: 54% (Top 30%)
- Reading Proficiency: 72% (Top 20%)
- Science Proficiency: 46% (Top 50%)
- Source: National Center for Education Statistics (NCES), ID Dept. of Education
Top Rankings
Timberline High School ranks among the top 20% of public schools in Idaho for:
Category
Attribute
Overall Rank
Reading/Language Arts Proficiency
School Overview
Timberline High School's student population of 1,391 students has stayed relatively flat over five school years.
The teacher population of 70 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 10-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,391 students
Gender %
Total Classroom Teachers
70 teachers
Year Founded
1998
Colors
Black, Royal blue, Silver
School Calendar
School Rankings
Timberline High School ranks within the top 20% of all 709 schools in Idaho (based off of combined math and reading proficiency testing data).
The diversity score of Timberline High School is 0.41, which is less than the diversity score at state average of 0.43. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#102 out of 709 schools
(Top 20%)
(Top 20%)
Math Test Scores (% Proficient)
54%
42%
Reading/Language Arts Test Scores (% Proficient)
72%
55%
Science Test Scores (% Proficient)
46%
41%
Student : Teacher Ratio
20:1
17:1
American Indian
n/a
1%
Asian
7%
1%
Hispanic
10%
20%
Black
2%
1%
White
76%
73%
Hawaiian
n/a
n/a
Two or more races
5%
4%
All Ethnic Groups
Graduation Rate
89%
80%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
9%
26%