Big Sisters and Little Sisters dancing together at Big Sister Association of Greater Boston's annual summer picnic on Boston's Long Island

Our Mission Statement

We ignite girls' passion and power to succeed through positive mentoring relationships with women and enrichment programs that support girls' healthy development.

Big Sister and Little Sister at a Boston Red Sox game, sponsored by Highland Street Foundation's Highland Hitters program.

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.

Volunteers waiting at the starting line to ride bikes for miles throughout Southeastern Massachusetts to benefit girls mentoring programs

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.

Woman with coffee and jump rope helping girls jump and play together

Enroll a girl today.

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

Annual Gala: Big in Boston

Go behind the scenes at our signature event with a recap and photo gallery from Big in Boston 2015 in our News section.

The 28th Annual Car Raffle
is here!

Tickets on sale now. Only 1,951 will be sold--amazing odds!

News & Events

  • Blog
  • 05/25/2016
  • Recipe for Success
  • Big & Little Sisters cook up healthy fare at Boston Public Market
  • Fundraiser
  • 06/05/2016
  • Celebrity Chef Dinner
  • Indulge in inspiration with Big Sister Boston and the city's most beloved chefs.


What Big Sister Means to Me

Hear what Big Sister means to the women and girls in our mentoring programs. Thank you, FleishmanHillard for creating this inspiring video! Help us get #Girls2Great.


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



Last year brought with it a great deal of change, from inside the walls of Big Sister Boston, to the heart of the communities we serve. There was change in the physical space where we work every day and in the staff who do that work. There was change in the way we talked about gender and race here in Boston and in our national dialogue. Therefore, it seems only fitting that we are changing the way we communicate our achievements as well. We have moved our annual report to a digital format which you will find here, and where you will read how more than 2,700 girls thrived in the face of change.