From Helpful sites

Nonprofit statistics

A website that I find myself going back to frequently is the Table Wizard at the National Center for Charitable Statistics. Wondering how many nonprofits are in your state? The Table Wizard can tell you. Curious about how nonprofits like yours in your state rank by size or income? The Table Wizard has the answers.

It’s not hard to use once you get the hang of it. You’ll amaze your boss or colleagues with your extraordinary knowledge of the nonprofit community.