Summary:
ZIP code 80503 encompasses nine public schools in the Niwot and Longmont areas of Colorado, serving roughly 6,105 students across five elementary schools, two middle schools, and two high schools, all within the St. Vrain Valley School District No. Re1J, a 4-star district ranked 23rd out of 115 in the state.
This is a high-performing area with significant standouts. Niwot High School leads at the secondary level, ranked 29th of 338 Colorado high schools (91st percentile, 5 stars), and outpacing Silver Creek High School on every SAT and PSAT measure—81% vs. 77% on SAT reading/writing and 51% vs. 47% on math—though Silver Creek still posts an excellent 97.5% graduation rate. At the middle school level, Altona Middle School is exceptional, ranking 21st of 469 (96th percentile, 5 stars) with 74.9% ELA and 67.7% math proficiency, well ahead of Westview Middle School at 60.3% and 51.3%. Among elementary schools, Niwot Elementary School and Hygiene Elementary School both rank in the 96th percentile with 5-star ratings, while Blue Mountain Elementary posts remarkable 5th-grade science (84.4%) and math (85.9%) proficiency rates.
The main concern is Eagle Crest Elementary School, which has fallen from the 70th to the 49th percentile over two years and is the only 2-star school in the ZIP code, with ELA proficiency at 42.1% and the highest elementary chronic absenteeism at 23.6%. Chronic absenteeism rises sharply at the secondary level—27.7% at Niwot High and 28.3% at Silver Creek—despite strong graduation rates around 97%. While Longmont Estates Elementary School remains solidly in the 72nd percentile, the gap between the top and bottom elementary schools exceeds 34 percentage points in ELA, making school choice within this ZIP code highly impactful for families.
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