hemisphere means hemi (half) sphere. two halves are by definition equal. therefore the eastern and western hemispheres are equal in size, neither is larger than the other. if you are talking about land or water areas, then eastern hemisphere has more (larger) land area, western hemisphere has more (larger) water area.SAMUEL ELI · 8 years ago.Thumbs up.he eastern hemisphere contains Asia, Europe, Africa and Australia, so it has more land mass, and also more population by far.