This is a list of bays along the Atlantic coast of Maine, roughly in order from northeast to southwest, and divided by county.
Washington County
Passamaquoddy Bay
Cobscook Bay
Dennys Bay
East Bay
Sipp Bay
South Bay
Straight Bay
Whiting Bay
Johnson Bay
Little Machias Bay
Machias Bay
Holmes Bay
Little Bay
Little Kennebec Bay
Englishman Bay
Mason Bay
Chandler Bay
Eastern Bay
Alley Bay
Western Bay
Wohoa Bay
Pleasant Bay
Narraguagus Bay
Back Bay
Flat Bay
Harrington Bay
Pigeon Hill Bay
Dyer Bay
Pinkham Bay
Gouldsboro Bay
Joy Bay
West Bay
Hancock County
Winter Harbor
Frenchman Bay
Eastern Bay
Flanders Bay
Taunton Bay
Egypt Bay
Hog Bay
Thomas Bay
Youngs Bay
Eastern Way
Somes Sound
Western Way
Western Bay
Union River Bay
Blue Hill Bay
Waldo County
Penobscot Bay
Belfast Bay
Gilkey Harbor
Seal Bay
Knox County
Rockport Harbor
Clam Cove
Rockland Harbor
Muscongus Bay
Lincoln County
Johns Bay
Linekin Bay
Boothbay Harbor
Booth Bay
Sheepscot Bay
Montsweag Bay
Hockomock Bay
Sagadahoc County
Merrymeeting Bay
Sagadahoc Bay
Cumberland County
Quahog Bay
Harpswell Sound
Middle Bay
Maquoit Bay
Casco Bay
York County
Saco Bay
Also, Bay of Fundy Gulf of Maine