The Collaborative International Dictionary of English v.0.48:

Xenium \Xe"ni*um\ (z[=e]"n[i^]*[u^]m), n.; pl. Xenia
   (z[=e]"n[i^]*[.a]). [L., from Gr. xe`nion gift to a guest,
   fr. xe`nos guest.] (Class. Antiq.)
   A present given to a guest or stranger, or to a foreign
   ambassador.
   [1913 Webster]

U.S. Gazetteer Places (2000):

Xenia, OH -- U.S. city in Ohio
   Population (2000):    24164
   Housing Units (2000): 9924
   Land area (2000):     12.147062 sq. miles (31.460746 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    12.147062 sq. miles (31.460746 sq. km)
   FIPS code:            86772
   Located within:       Ohio (OH), FIPS 39
   Location:             39.683707 N, 83.938064 W
   ZIP Codes (1990):     45385
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Xenia, OH
    Xenia


U.S. Gazetteer Places (2000):

Xenia, IL -- U.S. village in Illinois
   Population (2000):    407
   Housing Units (2000): 206
   Land area (2000):     0.518616 sq. miles (1.343209 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.518616 sq. miles (1.343209 sq. km)
   FIPS code:            83739
   Located within:       Illinois (IL), FIPS 17
   Location:             38.637870 N, 88.635955 W
   ZIP Codes (1990):     62899
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Xenia, IL
    Xenia