Altona Middle School
🇺🇸 Official data · 2025Longmont, Colorado 80503 · St. Vrain Valley School District No. Re1J
#14 of 262 middle schools in Colorado
#2367 of 15,369 nationally
About Altona Middle School
Altona Middle School is a public middle located in Longmont, in the St. Vrain Valley School District No. Re1J school district of Colorado, United States. It caters for Grades 6–8. In 2025 it enrolled 715 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 74.9 out of 100, placing it in the top 25% of middle schools in United States and 14th of 262 ranked middle schools in Colorado. Its strongest component is reading proficiency (89th percentile), and its weakest is students per teacher (20th percentile).
Other published figures: enrollment 715.
There are 27 schools in Longmont; Altona Middle School ranks 2nd of 26 scored schools there.
Success Index (US) breakdown
Each component is a percentile against middle schools across United States.
- Math proficiency (30%)60%
- Reading proficiency (30%)74%
- Community advantage (fewer free/reduced-price lunch) (25%)23.5%
- Students per teacher (15%)18.8
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Altona Middle School by the official sources.
- Enrollment
- 715
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 23.5%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 18.8
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 74%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 60%
- Share of tested students proficient or above (all students, all grades).
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Schools near Altona Middle School
Closest schools by straight-line distance, with their Success Index (US).
Eagle Crest Elementary School
Longmont · Public elementary · Grades PK–5
421 students · 179 m away
Silver Creek High School
Longmont · Public high · Grades 9–12
1,208 students · 848 m away
Blue Mountain Elementary
Longmont · Public elementary · Grades PK–5
542 students · 919 m away
Flagstaff Charter Academy
Longmont · Charter elementary · Grades PK–8
725 students · 3.0 km away
Sunset Middle School
Longmont · Public middle · Grades 6–8
316 students · 3.6 km away
Indian Peaks Elementary School
Longmont · Public elementary · Grades PK–5
214 students · 3.8 km away
Twin Peaks Classical Academy
Longmont · Charter other · Grades K–12
879 students · 3.9 km away
St. Vrain Community Montessori School
Longmont · Charter elementary · Grades PK–8
260 students · 4.6 km away
Burlington Elementary School
Longmont · Public elementary · Grades PK–5
320 students · 4.6 km away
Westview Middle School
Longmont · Public middle · Grades 6–8
621 students · 4.6 km away
Similar schools
Public middle schools in Colorado with a comparable Enrollment.
Horizon Middle School
Aurora · Public middle · Grades 6–8
714 students
Century Middle School
Thornton · Public middle · Grades 6–8
717 students
Thornton Middle School
Thornton · Public middle · Grades 6–8
721 students
Ken Caryl Middle School
Littleton · Public middle · Grades 6–8
725 students
Oberon Middle School
Arvada · Public middle · Grades 6–8
704 students
Coal Ridge Middle School
Firestone · Public middle · Grades 6–8
727 students
Frequently asked questions
Is Altona Middle School a good school?
Altona Middle School has a Success Index (US) of 74.9 out of 100 (Top 25% of middle schools in United States) and ranks #14 of 262 in Colorado. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Altona Middle School rank in Colorado?
Altona Middle School ranks #14 of 262 middle schools in Colorado and #2367 of 15,369 nationally on the Success Index (US) (2025 data).
How many students attend Altona Middle School?
Altona Middle School had 715 students in 2025.
Is Altona Middle School a elementary school or a high school?
Altona Middle School is classified as a middle covering Grades 6–8. It is a public school.
What other schools are near Altona Middle School?
There are 10 schools within 15 km of Altona Middle School; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.