Nonprofit Capacity Building Act of 2009 - Amends the National and Community Service Act of 1990 to establish a Nonprofit Capacity Building program requiring the Corporation for National and Community Service to award matching grants to intermediary nonprofit organizations for the delivery of organizational development assistance to small and midsize nonprofit organizations, especially those facing resource hardship challenges.
Directs the Corporation, to the extent practicable, to award such a grant to an intermediary nonprofit organization in each state.
Requires grantees to raise their share of the costs of providing such assistance through contributions from third parties, except where the grantee is a private foundation or specified charity.