[AlethiaSi]

Emblazoned on a dark blue field is the state coat of arms. The goddess Liberty holds a pole with a Liberty Cap on top. Liberty stands for freedom. At her feet is a discarded crown, representing freedom from England at the end of the revolutionary war. On the right is the goddess, Justice. She wears a blindfold and carries the scales of justice. Meaning that everyone receives equal treatment under the law. The state motto "Excelsior" on a white ribbon expresses the idea of reaching upward to higher goals. On the shield a sun rises over the Hudson highlands and ships sail the Hudson river. Above the shield is an eagle resting on a globe representing the Western Hemisphere.

I'm from NY so that's my fave... I also came across Alaska's which I thought was pretty neat:

When the United State purchased the Alaskan region from Russia in 1867, most Americans thought it was a crazy idea. For many years after, Alaska fought to become a state, but Congress refused to admit this cold, desolate place. In 1926, Alaskan members of the American Legion decided they needed more publicity for Alaska, so they held a contest in the grade schools for a design of a territorial flag. Benny Benson, an orphaned 13 year old, won the contest. When Alaska was finally adopted as a state in 1959, the flag design stayed. The only change was the blue hue of the background. Originally it matched the blue of forget-me-nots, the state flower; the revised color matches the blue on the American flag. The stars depict the Big Dipper constellation, symbolizing strength. The North Star was said to represent the future state of Alaska and its far northerly position.