Mortensen Elementary School

Set in LITTLETON, Colorado, Mortensen Elementary School is a tight-knit K-5 school, one of the schools within Jefferson County School District No. R-1. It teaches 260 students across grades pre-K through 5. That puts it 31% below the typical public school in Colorado, which averages around 379 students.

Jefferson County School District No. R-1 runs 148 schools in total, collectively educating 74,935 students. Mortensen Elementary School is one of those campuses.

On the student-mix side, Mortensen Elementary School reports that 67% of the student body identifies as White. Other groups include 22% Hispanic, 5% multiracial, 2% Black. That is meaningfully less White than the county at large, where the share is closer to 80%.

In terms of school funding signals, The school reports having 18 full-time-equivalent teachers, for a student-teacher ratio near 14.1:1. The state averages around 16.6:1, so this campus is tighter than the state norm typical. Roughly 37% of students at Mortensen Elementary School qualify for free or reduced-price lunch, often used as a Title I proxy.

On a demographically-adjusted basis, Mortensen Elementary School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 44.3%, the actual is 41.9%, a residual of -2.5 points.

In the broader community, ACS estimates for Jefferson County put median household income runs about $110,656, roughly 52% of adults have completed at least a four-year degree, and roughly 4% of residents live below the federal poverty line. In all, Jefferson County runs 168 public schools (combined enrollment of about 74,739 students), of which Mortensen Elementary School is one.

Shaffer Elementary School is the nearest neighboring public school, about 0.3 miles from this campus. 8 of the 8 nearest public schools sit inside a five-mile radius. Ranking that nearby cluster on reported proficiency puts Mortensen Elementary School at 7th of 9; the average score across the group is 51.8%.

The school occupies a residential site.

Five-year trend. Over the past 7-year window, the student count ticked down 34%: 396 students in 2018 compared to 260 in 2025. Class-load math has pulled in: from 17.1:1 in 2018 to 14.1:1 in 2025.

On the community side, the feed for Mortensen Elementary School typically covers classroom updates, athletics, and weather closures. Parents, students, alumni, and staff are welcome to weigh in.