Major sponsors of the block party include AT&T (via their Capitol Hill-based store The Lounge by AT&T), Jones Soda, the ACLU, and The Stranger. In 2013, the festival offered an option to donate to the local non-profit, 12th Avenue Arts project, when purchasing a ticket to the event. Capitol Hill Block Party matched donations up to a total of $5000, and in 2019, the producers reopened the same matching donations program for non-profits Jubilee Women’s Center, The Vera Project, Artists for Progress, and Lifelong.
