Mullen High School Photo #3

Mullen High School

Mullen High School is a private, co-educational school in southwest Denver which provides a Catholic, college-prep curriculum since 1931.
Our Lasallian philosophy of educating is dedicated to exemplary teaching, scholastic rigor and outstanding care for all students.

Quick Stats (2025)

  • Top Ranked CO School
  • Grades: 9-12
  • Enrollment: 860 students
  • Yearly Tuition: $20,475
  • Acceptance rate: 96%
  • Average class size: 20 students
  • Application Deadline: Dec. 14 / rolling
  • Source: Verified school update

Top Rankings

Mullen High School ranks among the top 20% of private schools in Colorado for:

Category
Attribute
Sports offered
School History

School Overview

Religious Affiliation
Grades Offered
Grades 9-12
Year Founded
1931
Colors
Navy Blue, Gold
First Day of School
Thu. Aug 14, 2025
Last Day of School
Fri. May 29, 2026

Student Body

Total Students
860 students
Student Body Type
Co-ed
% Students of Color
20%
State avg.: 25%
Students by Grade
Mullen High School Student By Grade

Academics and Faculty

Total Classroom Teachers
78 teachers
Student : Teacher Ratio
11:1
National avg.: 13:1
% Faculty w/Advanced Degree
33%
Average Class Size
20 students
Number of AP Courses
19 courses
List of Courses Offered
Classroom Dress Code
Casual
Mullen embroidered Polos, khaki or navy bottoms

Tuition and Acceptance Rate

Admission Deadline
Dec. 14 / rolling
Yearly Tuition Cost
Tuition Notes
Includes the $400 registration fee.
% on Financial Aid
38%
Acceptance Rate
96%
National avg.: 81%
Admissions Director
Lindsay Hooper
Admissions Associate
Natalie Paul '20
Application URL

Sports

School Notes

  • School Mascot: Mustangs
  • Mullen High School is a private, co-educational school in southwest Denver which provides a Catholic, college-prep curriculum since 1931. Our Lasallian philosophy of educating is dedicated to exemplary teaching, scholastic rigor and outstanding care for all students.
  • Sample of notable school alumni/alumnae:
    • JK Scott '14 - Punter for the LA Chargers
Source: Verified school update

Frequently Asked Questions

How much does Mullen High School cost?
Mullen High School's tuition is approximately $20,475 for private students.
What is the acceptance rate of Mullen High School?
The acceptance rate of Mullen High School is 96%, which is higher than the national average of 83%.
Who are famous alumni from Mullen High School?
Mullen High School famous alumni include: JK Scott '14.
What sports does Mullen High School offer?
Mullen High School offers 18 interscholastic sports: Baseball, Basketball, Cheering, Cross Country, Dance, Diving, Flag Football, Football, Golf, Ice Hockey, Lacrosse, Soccer, Softball, Swimming, Tennis, Track and Field, Volleyball and Wrestling. Mullen High School is ranked as one of the top 20% of private schools in Colorado for most sports offered.
What is Mullen High School's ranking?
Mullen High School ranks among the top 20% of private schools in Colorado for: Largest student body, Most AP courses offered, Most sports offered and Oldest founding date.
When is the application deadline for Mullen High School?
The application deadline for Mullen High School is Dec. 14 / rolling (applications are due on Dec. 14 but additional applications are reviewed year-round as space permits ).
In what neighborhood is Mullen High School located?
Mullen High School is located in the Fort Logan neighborhood of Denver, CO.

School Calendar

View the Mullen High School yearly calendar below. Note key dates such as:

Event
Date
First Day of School
August 14, 2025 (Thursday)
First Day of Classes
August 15, 2025 (Friday)
Labor Day - School Closed
September 01, 2025 (Monday)
Thanksgiving Break - School Closed
November 24, 2025 (Monday)
Thanksgiving Break - School Closed
November 25, 2025 (Tuesday)

School Reviews

5  
Mullen High School has been doing an incredible job accommodating the students and teachers during the COVID 19 pandemic. It has been tough, but I appreciate the work they are doing to keep us safe and bringing our community back together.
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Quick Stats (2025)

  • Top Ranked CO School
  • Grades: 9-12
  • Enrollment: 860 students
  • Yearly Tuition: $20,475
  • Acceptance rate: 96%
  • Average class size: 20 students
  • Application Deadline: Dec. 14 / rolling
  • Source: Verified school update

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Did You Know?

The average private school tuition in Denver, CO is $15,786 for elementary schools and $18,739 for high schools (read more about average private school tuition across the country).
The average acceptance rate in Denver, CO is 79% (read more about average acceptance rates across the country).

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