Troy is a high school name everyone in North OC recognizes. But Fullerton Union out-admitted them in the Class of 2025 enrollment year. 

Fullerton Union High School's UC admit rate in the most recent published cycle: 46.4 percent. Troy High School: 39.1 percent. Buena Park: 40.5 percent. Loara: 39.6 percent.

Let that sit for a second. Fullerton Union — not a school that comes up in the North OC college prep conversation the way Troy does — beat Troy by more than seven points. Buena Park beat Troy. Loara beat Troy. Oxford Academy, which is the one magnet program in this region that actually does come up in competitive parent conversations, came in at 39.3 percent — below Fullerton Union, and nearly tied with Troy.

The Troy reputation is enormous. Families make housing decisions around the Troy attendance zone. The school has a strong academic culture and a solid track record. None of that is wrong. But the UC data for the Class of 2025 enrollment year says the local hierarchy isn't what most North OC families assume.

This is one of our regional posts on Orange County UC admit rates. Every post names the public and charter high school in the region and shows you what the UC admissions data actually says. Today: North OC — Fullerton Joint Union, Anaheim Union, Placentia-Yorba Linda, Brea-Olinda, and the surrounding area.

One note: this data covers public and charter high schools only. Private schools are not included. UC suppresses data when applicant volumes are too small at the campus level, which effectively removes most private schools from the published dataset.

Twenty North OC public high schools, ranked — Class of 2025 enrollment year

A few things probably jumped out:



• Fullerton Union leads North OC at 46.4 percent. It's not a school that comes up first in competitive parent conversations for this region — that distinction belongs to Troy — but it's at the top of this table by a significant margin.
• Troy, with 2,476 applications, is the largest UC applicant pool in North OC and sits fourth on the admit rate list at 39.1 percent. The school is still producing 969 UC admits per enrollment year, which is a real number. The rate and the volume are telling two different stories.
• Buena Park, Loara, and Western all beat Troy on rate. None of them typically appear in conversations about North OC's college prep elite.
• Oxford Academy at 39.3 percent is the one magnet program many North OC parents would identify as the region's academic crown jewel. It barely leads Troy and trails Fullerton Union by 7 points. Oxford's rate was 41.1 percent in 2023, suggesting some regression — though 39 percent with 941 applications is still strong.
• Yorba Linda High at 34.7 percent and Canyon High at 33.2 percent — the schools in some of North OC's most affluent zip codes — sit at the bottom of this table. Both have large application numbers (827 and 1,197, respectively) and send meaningful raw numbers to UC, but their rates trail the district conversation around them.

This is real. Let's talk about why.

Why the Troy reputation and the Troy numbers don't line up

Troy High is a legitimately rigorous school. The STEM IB program, the depth of AP offerings, the academic culture — these things are real. The school's reputation isn't manufactured. But the UC admit rate reflects something specific about Troy that the school's brand doesn't advertise.

When a student applies to the UC system from Troy, the UC reviewer sees the school profile. They see a highly competitive applicant pool — thousands of students, most of whom are college-bound, many of whom have been systematically building UC-ready applications since middle school. In a pool this large and this uniformly strong, the competition within the school's applicant group is intense. The UC reviewers read every application in context, which means the context at Troy is "extremely competitive, resource-rich environment with a dense concentration of qualified applicants." That compresses the aggregate admit rate.

By comparison, when a student applies from Fullerton Union High — a smaller school with 332 applications, a different mix of family backgrounds, and a less uniformly elite applicant pool — that student's strong application stands out more clearly against the school's profile. UC's holistic review has leaned explicitly into school context and first-generation status since 1996. The result is that the top students at Fullerton Union and Buena Park are getting favorable reads from the UCs.

The practical implication for families: if you are sacrificing household logistics, budget, or family stability to be in the Troy zone, you should look hard at this data first. The UC outcomes at your current school may be closer to Troy's than the neighborhood chatter suggests.

Sub-area stories

Fullerton Joint Union District runs Troy, Sunny Hills, Fullerton Union, La Habra, and Sonora — a set of schools with meaningfully different profiles and meaningfully different UC rates. Fullerton Union at 46.4 percent is the top; Sunny Hills at 38.3 percent and Troy at 39.1 percent are mid-table; La Habra at 34.1 percent and Sonora at 35.0 percent are below district average. That's a 12-point spread within one district. The district doesn't have a single profile; it has five schools doing different things.

Sunny Hills's jump from 28.2 percent in 2023 to 38.3 percent in the Class of 2025 enrollment year is significant — a 10-point move over two years. Some of that is post-pandemic recalibration of UC's applicant pool, but it suggests Sunny Hills's pipeline has genuinely strengthened.

Anaheim Union District is the most diverse set in this table and also the most interesting. Buena Park at 40.5 percent, Loara at 39.6 percent, Western at 39.0 percent, and Oxford Academy at 39.3 percent all cluster together. Below them: Anaheim High at 37.1 percent, Cypress at 36.3 percent, Katella at 36.1 percent, Esperanza at 35.5 percent, Magnolia at 35.1 percent, and Savanna at 35.0 percent. Oxford Academy was at 41.1 percent in 2023, meaning it's actually declined slightly while Buena Park and Loara have climbed. That's the ELC dynamic at work: Oxford's increasingly competitive pool is doing to Oxford what Troy's pool is doing to Troy.

Buena Park's jump from 23.1 percent in 2022 to 40.5 percent in the Class of 2025 enrollment year is dramatic. A school-wide rate doubling in three years warrants some caution — but this is also consistent with district-wide post-pandemic patterns, and Buena Park's 2023 rate (28.9 percent) suggests the 2025 number reflects real improvement, not just one good year.

Placentia-Yorba Linda USD runs Valencia, El Dorado, and Yorba Linda. Valencia at 38.2 percent is the strong performer — it was 36.9 percent in 2023, showing consistency. El Dorado at 34.0 percent is steady-but-lower, and Yorba Linda at 34.7 percent trails its affluent residential reputation. Families in the Yorba Linda Hills often assume the school must be a top-tier UC feeder because of the neighborhood, yet the data is more modest.

Canyon High in Anaheim Hills at 33.2 percent is the bottom of this table. With 1,197 applications — the second-largest pool in this group after Troy — Canyon is sending a substantial number to UCs (398 admits), but the rate reflects the same pattern seen at Troy and Yorba Linda: a large, relatively affluent, college-bound applicant pool compresses when UC applies holistic context.

What this means for your family

If your student goes to Troy or Oxford Academy: the admit rate at the school is not the ceiling on what your kid can achieve. Troy saw 969 UC admits in the Class of 2025 enrollment year. Oxford had 370. Being in the top half of either school with strong courses and a genuine application puts your kid in a realistic position for multiple UCs. Don't let the rate make you over-apply to safeties, and don't let it make you switch schools.

If your student goes to Fullerton Union: this data is simply encouraging. 46.4 percent is the highest rate in North OC. UC is already seeing strong students from your school favorably. If your kid is in the top tier of the class, the ELC guarantee may apply, and the school's profile works in their favor in holistic review.

If your student goes to Buena Park, Loara, or Western: these numbers tell you the schools are producing strong UC outcomes for their applicants. The ELC program means the top 9 percent of each class has a guaranteed UC pathway — and these schools' strong rates suggest the UC system is reading their applicants well. If your kid is strong for their school, the data backs them up.

If your student goes to Yorba Linda or Canyon: solid schools, but the rates here (34.7 and 33.2 percent) are below the North OC average. That doesn't mean your kid can't get to UC — it means the applicant pool at these schools is competitive enough that the school-wide rate compresses. Stand out within the school's profile, take the hardest courses available, and apply strategically.

For everyone: use the UC Information Center to look at your specific school's campus-level data (UC Information Center). Which specific UC campuses have the best admit rates for your school? That tells you a lot about where to put your UC energy.

A few honest cautions

Year-over-year swings can be real but noisy. Magnolia High was at 43.6 percent in 2023 and 35.1 percent in the Class of 2025 enrollment year — an 8-point drop. Western was 26.4 percent in 2023 and 39.0 percent in 2025 — a 13-point rise. These swings partly reflect genuine change and partly reflect the small denominators and year-to-year variation in applicant pool composition.

Fullerton Union's pool is small — 332 applications. At that size, a shift of 25 to 30 students changes the rate by several points. The number is real, but it should be understood as a trend indicator.

These are aggregate UC rates across all nine campuses. A school's aggregate rate doesn't tell you what happens at Berkeley or UCLA specifically. The campus breakdown matters for building a realistic list.

By Sunny Grewal, StrivePath provides personalized academic and college advising, guiding students to discover their strengths and achieve their potential — resulting in happier students, less stressed families, and better admissions outcomes.

Sources

• UC Information Center — admissions by source school
• UCOP Fall 2025 Admissions Summary
• UC Eligibility in the Local Context (ELC)
• California Department of Education DataQuest