While researching an article, I found a Database of Megachurches in the U.S. hosted by the Hartford Institute for Religion Research.
The database below contains information on all the megachurches we have been able to locate in the United States. We continually make changes this list and welcome suggestions and additions. If you are interested in what a megachurch is, read our megachurch definition or more recent research. You may also want to read the description on how we collected this information.
Neat stuff. There are way more megachurches than I suspected.