The Collaborative International Dictionary of English v.0.48:

Casa \Ca"sa\, n. [Sp. or It., fr. L. casa cabin.]
   A house or mansion. [Sp. Amer. & Phil. Islands]

         I saw that Enriquez had made no attempt to modernize
         the old casa, and that even the garden was left in its
         lawless native luxuriance.               --Bret Harte.
   [Webster 1913 Suppl.]

U.S. Gazetteer Places (2000):

Casa, AR -- U.S. town in Arkansas
   Population (2000):    209
   Housing Units (2000): 93
   Land area (2000):     1.089625 sq. miles (2.822116 sq. km)
   Water area (2000):    0.001351 sq. miles (0.003498 sq. km)
   Total area (2000):    1.090976 sq. miles (2.825614 sq. km)
   FIPS code:            11890
   Located within:       Arkansas (AR), FIPS 05
   Location:             35.023700 N, 93.047236 W
   ZIP Codes (1990):     72025
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Casa, AR
    Casa