St. Teresa High School

St. Teresa High School is a secondary school serving the Decatur, Illinois area.
As a Catholic school committed to the development of the whole person, St. Teresa seeks to integrate faith and life by instructing students in human knowledge and skills in the light of the gospel.
As a Catholic school committed to the development of the whole person, St. Teresa seeks to integrate faith and life by instructing students in human knowledge and skills in the light of the gospel.
St. Teresa High School, a Catholic Secondary School committed to the development of the whole person, seeks to integrate faith and life by instructing students in human knowledge and skills in the light of the gospel.
Educationally, it strives to foster a reverence for learning and to equip students with the professional and technical competencies to function in a modern society; psychologically, the program hopes to guide students to an understanding of self and others and to a facility in the means of human communication.
Spiritually, St. Teresa seeks to lead students, through prayer and instruction, to a deeper and more faith-filled sense of their own worth as gifted, though flawed, individuals and to a personal experience with God.

Quick Facts (2025-26)

  • Top Ranked IL School
  • Grades: 9-12
  • Enrollment: 227 students
  • Application Deadline: None / Rolling
  • Source: Verified school update

Top Rankings

St. Teresa High School ranks among the top 20% of private schools in Illinois for:

Category
Attribute
School History

School Overview

School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades 9-12
Year Founded
1866
Colors
Blue, Orange
School Calendar

Student Body

Total Students
227 students
Student Body Type
Co-ed
% Students of Color
12%
State avg.: 34%
Students by Grade
St. Teresa High School Student By Grade

Academics and Faculty

Total Classroom Teachers
21 teachers
Student-Teacher Ratio
11:1
National avg.: 13:1
Classroom Dress Code
Casual

Tuition and Acceptance Rate

Admission Deadline
None / Rolling

School Notes

  • School Mascot: Bulldog
Source: Verified school update

Frequently Asked Questions

What schools are St. Teresa High School often compared to?
St. Teresa High School is often viewed alongside schools like Lutheran School Association by visitors of our site.
What is St. Teresa High School's ranking?
St. Teresa High School ranks among the top 20% of private schools in Illinois for: Oldest founding date.
When is the application deadline for St. Teresa High School?
The application deadline for St. Teresa High School is rolling (applications are reviewed as they are received year-round).

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Quick Facts (2025-26)

  • Top Ranked IL School
  • Grades: 9-12
  • Enrollment: 227 students
  • Application Deadline: None / Rolling
  • Source: Verified school update

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Did You Know?

The average private school tuition in Illinois is $11,153 for elementary schools and $15,737 for high schools (read more about average private school tuition across the country).
The average acceptance rate in Illinois is 84% (read more about average acceptance rates across the country).

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