Big Brothers Big Sisters of Puget Sound is the largest donor- and volunteer-supported mentoring nonprofit in Washington. It has been matching kids with adult mentors since 1957 and now covers five counties around the Sound: King, Pierce, Snohomish, Island, and Kitsap. Alonda Williams is President and CEO, and the agency runs from a headquarters in Bellevue. It runs three programs, from the classic one-to-one model to a group program built on the Credible Messenger approach, and it carries a four-star rating from Charity Navigator.
The agency builds and supports one-to-one relationships between adult volunteers, its Bigs, and local kids, its Littles. The belief behind the work is plain: one consistent, caring adult can change where a young person's life goes. Staff screen volunteers, make the matches, and stay in regular contact so a relationship has the support it needs to last. As the largest mentoring nonprofit in the state, Puget Sound carries a big share of Washington's mentoring capacity, and it backs the work with outcome numbers most programs cannot show.
Alonda Williams serves as President and CEO. Under her, the agency has held a four-star rating from Charity Navigator with a 99 percent score, along with a transparency seal on Candid (GuideStar). Those ratings matter to donors trying to sort strong charities from weak ones, but the numbers that say more are the program outcomes: among mentored high school seniors, the graduation rate is 100 percent; 79 percent of youth reported improvement in depressive symptoms; and 88 percent improved or held steady on emotional regulation. The agency served 866 young people in the 2024-25 year.
The five-county footprint stretches well beyond Seattle. King County holds Seattle and Bellevue and most of the population. Pierce County to the south centers on Tacoma. Snohomish County reaches north toward Everett, while Island and Kitsap counties cover the communities across the water, including Whidbey Island and the Kitsap Peninsula. Serving islands and peninsulas adds a wrinkle most urban affiliates never face, since ferry schedules and travel time shape how often a Big and Little can realistically meet. Basing the headquarters in Bellevue puts the agency at the center of the region's densest population and its strongest base of tech-sector donors and corporate partners.
The traditional one-to-one match for youth ages 6 to 18. A Big and Little connect on their own schedule, aiming for at least a few hours together each month.
Structured sessions at schools and partner company offices. Built through partnerships among schools, employers, and in some cases government, which lowers the barrier for working volunteers.
A newer model that connects several Littles with one mentor who shares their background and lived experience. Built on the Credible Messenger approach, with a focus on reducing community violence.
Start at inspirebig.org with a volunteer application, then complete an interview and a background check before staff match you with a Little. The match is built around shared interests and a location that makes regular meetings workable, which in this region can mean accounting for a ferry ride. Community-based matches ask for an ongoing, roughly yearlong commitment. If that is more than you can manage, the site-based program meets at a fixed place and time and is easier to fit around a full work week.
Donations go through inspirebig.org, and the agency is a 501(c)(3), so gifts are tax-deductible. The four-star Charity Navigator rating gives donors reasonable confidence that money is well spent, and because this is a locally run agency rather than a pass-through to a national office, gifts made here stay in the Puget Sound region. For donors who want both a strong financial rating and local impact, that combination is the draw.
The Seattle area has a deep field of youth nonprofits, including the Boys & Girls Clubs of King County, YMCA branches, and education-focused groups like Rainier Scholars. Most serve children in group settings. Big Brothers Big Sisters of Puget Sound is the state's largest provider of the supported one-to-one match, and the published outcome data and four-star rating give it an evidence base many programs lack. For a volunteer who wants a lasting bond with one child, or a donor weighing where a gift does the most measurable good in Washington, it stands out.
Sources: Big Brothers Big Sisters of Puget Sound website and about page (inspirebig.org), Charity Navigator rating, and the agency's nonprofit filings (EIN 91-0673185). Outcome figures, youth-served count, and founding year per the agency's published materials. We are not affiliated with Big Brothers Big Sisters of Puget Sound and receive no compensation for this listing. Spotted an error? [email protected]
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