This is a reasonably current list of all of the Grand Lodges in the United States. A Grand Lodge is the governing body that oversees all the individual Lodges in their jurisdiction. In the United States, every state, the District of Columbia and Puerto Rico all have Grand Lodges, and their jurisdictions are their states. No effort has been made to verify recognition between the Grand Lodges.
By visiting these sites you can find out more about the requirements for membership, more about Freemasonry in that particular jurisdiction, and even the location of Lodges near you.