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St. Mary's School

312 Seneca St
Storm Lake, IA 50588
St. Mary's High School is a private, Catholic high school in Storm Lake, Iowa. It is located in the Diocese of Sioux City.

Quick Facts (2026)

  • Grades: Prekindergarten-12
  • Enrollment: 310 students
  • Application Deadline: None / Rolling
  • Source: National Center for Education Statistics (NCES)

Top Rankings

St. Mary's School ranks among the top 20% of private schools in Iowa for:

Category
Attribute

School Overview

Religious Affiliation
Grades Offered
Grades Prekindergarten-12
Year Founded
1912
Colors
White, Black
School Calendar

Student Body

Total Students
310 students
Student Body Type
Co-ed
% Students of Color
39%
State avg.: 16%
Students by Grade

Academics and Faculty

Total Classroom Teachers
31 teachers
Student-Teacher Ratio
10:1
National avg.:

Tuition and Acceptance Rate

Admission Deadline
None / Rolling
Application URL
Source: National Center for Education Statistics (NCES)

Frequently Asked Questions

When is the application deadline for St. Mary's School?
The application deadline for St. Mary's School is rolling (applications are reviewed as they are received year-round).

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Quick Facts (2026)

  • Grades: Prekindergarten-12
  • Enrollment: 310 students
  • Application Deadline: None / Rolling
  • Source: National Center for Education Statistics (NCES)

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Did You Know?

The average private school tuition in Iowa is $8,981 for elementary schools and $11,290 for high schools (read more about average private school tuition across the country).
The average acceptance rate in Iowa is 87% (read more about average acceptance rates across the country).

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