Mission 

Guided by our belief in the transformative power of education, we inspire a love of learning, foster curiosity and encourage responsibility toward the world.

Our mission states:
Hackley challenges students to grow in character, scholarship, and accomplishment, to offer unreserved effort, and to learn from the varying perspectives and backgrounds in our community and the world.

Core Values

Four core values guide life at Hackley.

They are expressed in our traditions, our interactions and the spaces we share on campus. These principles help our community work, learn and grow together with purpose, integrity and mutual respect.

Portrait of a Graduate

Our Portrait of a Graduate reflects the qualities we cultivate in every Hackley student: a well-rounded, thoughtful individual prepared to contribute meaningfully to their communities and the world. Rooted in Hackley’s mission, core values and unique culture, it emphasizes the importance of relationships, diverse perspectives and accomplishments that serve a greater purpose. This vision ensures that our graduates leave with enduring academic skills and a deep commitment to making a positive impact beyond themselves.

School Competencies

Hackley’s competencies define the essential skills and attributes we nurture to prepare students for success in school and life. These include critical thinking, creativity, collaboration and leadership — foundational qualities for thriving in an ever-changing world. Through intentional teaching and learning, we equip students to navigate challenges with confidence and purpose, encouraging their growth as adaptable and innovative leaders.

Read More About Our School Competencies

Our History

Founded in 1899 as a college preparatory school for boys, Hackley quickly established itself as a place of academic rigor and inclusivity. Under the visionary leadership of Mrs. Frances Hackley, the School moved to its current campus in Tarrytown by 1902, adopting our enduring core value, “Enter here to be and find a friend.” From its earliest days, Hackley welcomed students of diverse backgrounds, guided by the Latin motto Iuncti Iuvamus — “United, we help one another.”

Mrs. Hackley, a philanthropist and advocate for education, co-founded Barnard College and supported such institutions as the Manassas Industrial School for Colored Youth. Her  commitment to intellectual curiosity and spirit of exploration and understanding continues to inspire Hackley’s mission today.

Hackley has evolved since its founding into a co-educational K-12 day school (becoming co-educational in 1970) with five-day Upper School boarding. This growth has expanded the diversity of perspectives in our community while vibrantly carrying our founder’s vision forward.

The Old Oak

For over a century, Hackley’s iconic Old Oak stood as a symbol of tradition and welcome at the entrance of the Quad.

On August 4, 2020, the tree fell during Tropical Storm Isaias, marking the end of an era. Honoring its legacy, salvaged pieces of the Old Oak were crafted into meaningful artifacts, including a podium for the Allen Center for the Creative Arts and Technology, a desk for the Head of School’s office, and benches placed outside each division office. 

Read: The Old Oak Earns a New Life on the Hilltop