Emmett O'Brien Technical High School

At 141 Prindle Ave. in Ansonia, Connecticut, Emmett O'Brien Technical High School operates as a small high school. The school enrolls 618 students, from grades 9 through 12. An average school in this group (high schools in Connecticut) has about 788 students.

Connecticut Technical Education and Career System has 17 schools; together they serve 11,296 students.

The most common group at Emmett O'Brien Technical High School is White students, at 45%. Enrollment also includes 37% Hispanic, 11% Black, and 6% multiracial. The school's White share is 20 points below the 64% share among Naugatuck Valley Planning Region residents. The school's diversity index is 64%, meaning two students picked at random have a 64% chance of belonging to different racial or ethnic groups.

Teachers at the school number 50.7 full-time equivalents, and the ratio is 12.2:1. For comparison, high schools in Connecticut average 12.3:1. Roughly 44% of the student body qualifies for free or reduced-price lunch.

According to the American Community Survey, in Naugatuck Valley Planning Region, the median household income is $86,191, roughly 34% of adults have a four-year degree or more, and the share of residents below the poverty line is 9%. There are 121 public schools in Naugatuck Valley Planning Region, enrolling about 59,861 students in all.

Nearest public school: Prendergast School, about 0.3 miles away. Within five miles are at least 8 other public schools.

Federal data place Emmett O'Brien Technical High School in the Suburb: Large locale, which means it is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.

Compared with 2020-21, the school had 74 fewer students in 2024-25.

Questions about enrollment questions, class placement, and PTA news can be posted here. Questions from prospective families are welcome too.