Charities and non profit organizations are monitored by state agencies and the Internal Revenue Service, and tracked by many private advocacy groups. Even if you’re not particularly interested in a specific charitable organization you might want to know the people and other entities with which they’re associated. Business journalism reporter Bill Smith developed a guide to analyzing the IRS 990 forms that nonprofits are required to submit. He also links to the advocacy groups, Charity Navigator, BBB Wise Giving Alliance and Guide Star where you can get the document images of the IRS 990 forms filed by the charities. Ministry Watch and The Foundation Center have background on nonprofits that aren’t required to file IRS form 990.

Bookmark this IRS site that lists links to each states’ charity regulator, either the Attorney General or Secretary of State, where you’ll be able to lookup details on the charitable organization.

Search for a tax deductible organization by partial name in all 50 states at once.