47 miles
Hawaii is the widest state east to west.
Several sources found on the internet, among them the Hawaii state tourist board, Yahoo, and the US States Almanac, all agree that Hawaii is the widest state on an east-west axis. However, as the global divisional point between east and west is 180° longitude. And that Alaska spans across the 180° longitude line; if you are to measure FROM the "eastern" most point of Alaska (at 180° longitude) TO the "western" most point of Alaska (also at 180° longitude) at approximate the 50th parallel; then you have a measurement of approximated 17,000 miles -- clearly making Alaska the widest state as measured FROM east TO west.
The widest country from East to West is Russia at 9,000 km (5,592 miles)
At 2.3 miles, 14th Street is the widest point in Manhattan.
The widest point in Britain from west to east is approximately 874 miles (1,407 kilometers) between the easternmost point of East Anglia and the westernmost point of Ardnamurchan in Scotland.
At its widest point, Tasmania is about 300 km from east to west.
From the East Coast to the West Coast the U.S. is roughly 3000 miles long. Its nearly 3400 from the widest part
At its widest point from east to west, Tasmania spans 315 km.
Pennsylvania
Massachusetts is 190 miles long and 50 miles wide at its widest point
The Florida Peninsula is approximately 150 miles across at its widest point. This region is known for its diverse ecosystems, including wetlands, beaches, and forests. It is bordered by the Gulf of Mexico to the west and the Atlantic Ocean to the east. The peninsula plays a significant role in the state's geography and climate.
The equator is an imaginary line which runs around the widest part of the Earth in an East/West direction.