South Mountain High School

South Mountain High School operates as a sprawling secondary school in PHOENIX, Arizona, one of the schools within Phoenix Union High School District (4286). Current enrollment sits at 2,207 students spanning grades 9 through 12. Compared to the state average of about 631 students per school, that is 250% larger than typical.

Across the 20 schools in Phoenix Union High School District (4286) (25,800 students total), South Mountain High School accounts for its share of the district's footprint.

Demographically, South Mountain High School shows that 79% of the student body identifies as Hispanic. Beyond that, the school shows 15% Black, 3% White. By comparison, Maricopa County as a whole is about 31% Hispanic, so the school skews considerably more Hispanic than its surroundings.

Looking at the economic backdrop, Staff filings list 107 full-time-equivalent teachers, which works out to roughly 20.7:1 students per teacher. That tracks the state average closely.

In the area at large, ACS estimates for Maricopa County put median household earnings sit near $89,300, 37% of adults hold a bachelor's degree or higher, and the poverty rate sits near 8%. In all, Maricopa County runs 1352 public schools (combined enrollment of about 725,139 students), of which South Mountain High School is one.

Nearest neighbor: International Commerce High School - Phoenix, around 0.5 miles off. Within five miles, there are 8 other public schools.

The campus sits in an inner-city setting.

Looking at the recent track record. Looking back 7 years, enrollment at South Mountain High School has rose 12%, going from 1,977 students in 2018 to 2,207 in 2025. Class-load math has grew: from 18.0:1 in 2018 to 20.7:1 in 2025.

Within the allk12 community for this school, the feed for South Mountain High School typically covers sports schedules, lunch menu changes, and school spirit week. Contributors range from current parents to recent graduates and teachers.