The Collaborative International Dictionary of English v.0.48:

Bohemia \Bo*he"mi*a\, n.
   1. A country of central Europe.
      [1913 Webster]

   2. Fig.: The region or community of social Bohemians. See
      Bohemian, n., 3.
      [1913 Webster]

            She knew every one who was any one in the land of
            Bohemia.                              --Compton
                                                  Reade.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Bohemia
    n 1: a historical area and former kingdom in the Czech Republic
    2: a group of artists and writers with real or pretended
       artistic or intellectual aspirations and usually an
       unconventional life style

U.S. Gazetteer Places (2000):

Bohemia, NY -- U.S. Census Designated Place in New York
   Population (2000):    9871
   Housing Units (2000): 3387
   Land area (2000):     8.725651 sq. miles (22.599332 sq. km)
   Water area (2000):    0.032120 sq. miles (0.083190 sq. km)
   Total area (2000):    8.757771 sq. miles (22.682522 sq. km)
   FIPS code:            07157
   Located within:       New York (NY), FIPS 36
   Location:             40.770042 N, 73.113760 W
   ZIP Codes (1990):     11716
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Bohemia, NY
    Bohemia