About

No One Knows Girls Like Agnes Irwin

Divider Wreath

The Agnes Irwin School was founded over 150 years ago by Miss Agnes Irwin — the great-great-granddaughter of Benjamin Franklin and first Dean of Radcliffe College — a woman of unmistakable character, born of her determination and vision to shape girls' education in a path-breaking way for her time.

Today, AIS is one of the country's oldest, continuously operating, non-sectarian all girls PreK-12 college preparatory schools, known for providing girls and young women with challenging academics in a nurturing environment.

Miss Agnes Irwin's legacy continues to inspire us. Across our Lower, Middle, and Upper School divisions, every aspect of the Agnes Irwin experience is grounded in research on how girls learn, develop, and thrive.

Here, girls are known, understood, supported, and challenged — empowering them to lead, succeed, and embrace their potential.

Our History

We've been empowering girls since 1869. Browse through Agnes Irwin's history — from the early days in Center City, to our beautiful 26-acre campus in Bryn Mawr — and meet a few of the notable women who have walked our halls along the way.

1800's

1900's

2000's

Leadership and Legacy

Head of School

Meet Sally B. Keidel, 14th Head of The Agnes Irwin School.

Board of Trustees

A bronze-colored, ornate oil lamp with a pointed top and intricate designs on the base sits on a plain background.

Meet the distinguished leaders who guide and provide counsel to our school.

Strategic Plan

Discover our Strategic Plan, a framework built on our rich legacy and bold aspirations for the future.

Our Mission

The Agnes Irwin School empowers girls to learn, to lead, and to live a legacy.

The Agnes Irwin Experience

Academics

Arts

Athletics

Beyond the Classroom

Agnes Irwin Key Stats

$5.3M

tuition assistance awarded

75

zip codes represented

26%

students of color

6:1

average student-faculty ratios

20%

Class of '24 are recruited athletes

A group of diverse students, wearing school uniforms, engaged in conversation and interaction in what appears to be a school hallway or corridor.

The Center for the Advancement of Girls

We think of it as our superpower. Our Center for the Advancement of Girls helps infuse girl-centered research into the Agnes Irwin experience, impacting our curriculum, creating developmentally relevant programming, and forging strategic partnerships with leading researchers and institutions of higher learning that shape our student experience.

Learn about The Center