Our Mission Statement

Big Sister Association of Greater Boston's mission is to help girls realize their full potential through positive mentoring relationships with women.

Become a Big Sister today.

It isn't about being perfect. It's about being present. Find out how to become a Big Sister today.

Get Involved.

You don't have to be a mentor to make a difference. Join thousands of men and women supporting Greater Boston's girls through volunteerism and philanthropic contributions.

Enroll a girl today.

If you want your daughter to have a Big Sister, enroll today with our simple online application.

Most Recent Event: Big in Boston

Date: November 9, 2013

Location: Museum of Fine Arts Boston

Honoring Karen Kaplan of Hill Holliday

Celebrity Chef Dinner, Tico

Join us for a night that will delight your senses and inspire your spirit.            

News Events


Become a Big Sister today!

Watch our new PSA, generously produced by Media Partner WBZ CBS Boston, featuring Big Sister Evelyn and Little Sister Blasmiry.


Big Sister raises 85% of our annual revenue through private philanthropy; your donation is critical.


Click here to watch an interview with CEO Deborah Re and Big Sister Evelyn Reyes, on Suffolk County Sheriff Steven Tompkins' Common Ground series. Learn how we are making a difference for Boston’s girls.