Is France located in the northeastern hemisphere?

There is no such thing as a northeastern hemisphere. Hemisphere comes from Greek and means half globe or half orb. Northeast would result in a quarter globe; the part that the northern and the eastern hemisphere both cover.

The northern hemisphere is the part of the earth that lies North of the equator (i.e. everything between the equator and the north pole). The Southern Hemisphere, as you would have guessed, is the opposite.

The eastern hemisphere is the part of the earth that lies east of the 0-meridian (the north-south linh that runs through Greenwich, London). The Western Hemisphere, again, is the opposite. They meet on the opposite side of the earth at 180°, approximately on the date/time border.

France is on the northern hemisphere and the major part of it, is on the eastern hemisphere.