Summary:
ZIP code 88130 has one public high school, Portales High, serving grades 9–12 with 754 students in Portales, New Mexico, as part of Portales Municipal Schools.
For parents, the most important split is that Portales High’s 2024–25 graduation rate is 91.9%, equal to the district and 11.3 percentage points above New Mexico’s 80.6%. Yet test proficiency is below the state in every reported subject and exam. Mathematics is the weakest area: 10.56% proficient in 2025–26 and 6.79% in 2024–25. Math did improve by 3.77 percentage points year over year, and the gap to the state narrowed from -5.43 to -1.97 percentage points. English language arts was 30.9% in 2025–26, down from 32.92% in 2024–25, and still below the state. Science on the NM-ASR fell from 36.02% to 23.89%, a 12.13-point decline, while the school-state gap widened from -5.67 to -10.38 points.
Rankings also shifted: Portales High was 85 of 172, 51st percentile, 3 stars in 2023–24, then 91 of 131, 31st percentile, 2 stars in 2024–25, and 91 of 132, 31st percentile, 2 stars in 2025–26. The district, Portales Municipal Schools, ranks 61 of 87, 30th percentile, 2 stars. The school has a 15.5 student-teacher ratio and 99.73% of students qualify for free/reduced lunch, indicating near-universal economic need. Because it is the only high school in the ZIP, there are no within-ZIP peers; its scores match the district’s high school results, so comparisons are best made to the district, the state, and prior years. Data are limited to a few years and offer no demographic breakdown or growth measure, so focus on the clear patterns: strong graduation, low proficiency, weak science trend, and lower recent ranking.
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