As of 2026, several high schools in the United States offer single admission, a policy where only one student is admitted from a particular family. This selective approach is often seen in prestigious institutions aiming to maintain a high standard of education and diversity within their student body. Notable schools include St. Paul's School, Phillips Academy Andover, and Exeter. These schools have historically implemented single admission policies to ensure a competitive and merit-based selection process.

The rationale behind single admission policies is rooted in the desire to foster a diverse and academically rigorous environment. According to a report by the National Association of Independent Schools (NAIS), schools with single admission policies tend to have a more diverse student body, as they are not limited by the number of students a family can enroll. This diversity is crucial for creating a rich learning experience and preparing students for the globalized world.

For instance, St. Paul's School, a leading preparatory school in New Hampshire, has been practicing single admission since its founding in 1856. The school's commitment to this policy is evident in its mission to "select students who will thrive in an environment that emphasizes intellectual rigor, creativity, and character development." Similarly, Phillips Academy Andover and Exeter, both located in Massachusetts, have long-standing single admission policies that prioritize academic excellence and individual growth.

Data from the NAIS indicates that schools with single admission policies tend to have higher average SAT scores and a more diverse student body compared to schools without such policies. For example, in 2024, the average SAT score at Phillips Academy Andover was 1450, significantly higher than the national average. Additionally, the school's student body consists of students from over 40 countries, reflecting its commitment to global diversity.

In conclusion, several high schools in the United States, including St. Paul's School, Phillips Academy Andover, and Exeter, offer single admission in 2026. This policy is designed to maintain a high standard of education and promote diversity within the student body. Data from the NAIS supports the notion that single admission schools tend to have higher academic standards and a more diverse student population.