The groundhog (Marmota monax) is a large rodent indigenous to
North America, and its population is not restricted to a single
city and state. If the question is really about a particular
groundhog honored on Groundhog Day, which is a celebration held in
the United States and Canada on February 2nd each year, then the
groundhog in question is one known as "Punxsutawney Phil." He is
thus named for the city where one of the largest celebrations of
Groundhog Day takes place in the United Staes: Punxsutawney,
Pennsylvania. In Canada, the famed groundhog is "Wiarton Willie,"
so named for Wiarton, Ontario.
According to folklore, if a groundhog emerging from its burrow
on this day fails to see its shadow, it will leave the burrow,
signifying that winter will soon end.