Bay States

When I moved to Massachusetts from the San Francisco Bay area, I thought it was funny that Massachusetts was the Bay State, while California, which has many more bays, is not.

A Bay is a broad inlet of the sea where the land curves inward.  This could be quite a shallow inlet, or a deep one.  Some bays are called harbors when they're confined enough to provide some protection.  A sound is between two bodies and is open at both ends.

Here's a list of the Bay States:
Maine:  The biggest is Penobscot Bay, but there are zillions of others.
New Hampshire, with a very short coastline, nevertheless has a number of bays.
Massachusetts has three main bays: Massachusetts Bay, Cape Cod Bay, and Buzzards bay.  there are also a number of smaller bays and sounds.
Rhode Island is basically one big Bay: Narragansett Bay, with a bunch of penninsulas and islands in it.
Connecticut has many things that would be called bays, but most of them seem to be unnamed, or are called harbors.
New York has many bays: New York Bay, Jamaica Bay, several more, even not counting most of NY's shoreline on Long Island.
New Jersey: Sandy Hook Bay, Newark Bay, Delaware Bay, many others.
Delaware is largely defined by it's giant bay, which is the boundary between it and New Jersey.
Maryland is similarly defined by its giant bay, the Chesapeake, which continues on to Virginia
Virginia's Atlantic Seaboard is largely the Chesapeake bay, although there's a short section that has a few bays of its own, and there's an isolated part of Virginia on the Delaware penninsula.
North and South Carolina's Coastline consists of a series of large, wide bays.
The coastal area of Georgia is made up of a bunch of low islands.  Consequently, most of their inlets are sounds, not bays.
Florida has many famous bays: Tampa Bay, Biscayne Bay, Pensacola Bay, many others.
Alabama is a very short coastline, but it's basically all Bays.  Mobile Bay is the biggest.
Mississippi also has a short coastline: Pascagoula Bay, Biloxi Bay, St Louis Bay are all on it.
The Mississippi Delta area of Louisiana has so many bays it's silly to try to count.  I gave it a start and realized I was making mistakes around the time I got to 100.
Texas has quite a few too: Galveston Bay, Corpus Christi Bay, etc.
California starts at the south with San Diego Bay, Mission Bay, Alamitos Bay, Morro Bay, Monterey Bay, San Francisco Bay, Drakes Bay, Tomales Bay, Humbolt Bay.  Lots more.
Oregon: Coos Bay, Alsea Bay, Tillamook Bay, Youngs Bay.  Small Bays.
Washington: Willapa Bay, Grays Harbor, Discovery Bay, Puget Sound (which is really a bay with some big islands in it)

I won't try to do Alaska and Hawaii.

My ranking is based on how big a part of the state the bay or bays are:
#1 Rhode Island
#2 Delaware
#3: Maryland
#4: Massachusetts
#5 California
#6 Florida

If California didn't also have a bunch of big mountains and valleys, it'd be #1.