As far as US territory, Point Udall in St. Croix, USVI is the easternmost point. I have been out there when the US Army practised communication exercises.
west quoddy head
maine
This is actually a bit of a complicated answer, because it depends on what you really mean by "in the United States." And here's why I say that: Technically, Wake Island, an unorganized, unincorporated territory of the United States is west of the International date line, and so it is 1 day ahead of what we typically think of as "the United States." Maine is the eastern most State, and Lubec is the eastern most town, making it the eastern most town in the Continental United States to see daylight. However, West Quoddy Head, which is part of Lubec, is considered the eastern most point in the Continental United States. And, of course, Point Udall in St. Croix (U.S. Virgin Islands) is the eastern most point of all the US Territories.
Alaska, which also has the eastern most point
The eastern-most point in the continental United States is in Quoddy Head State Park in Maine. When considering US Territories, Guam is the eastern-most territory (by lattitude) with an official flag and a seat in the House; and Wake Island is the farthest east US territory by latitude.
Maine
Russia contains the most eastern point on the continent of Europe.
The most eastern point in Europe is in Russia (Cape Flissingski)
California
The most eastern point of the u s is the montalk lighthouse
yes
West Quoddy Head is located near the town of Lubec, Maine and is the eastern most point of the contiguous 48 states.
St Johns, Newfoundland to Graham Island, BC
The most easterly point in Ireland is in county Down.