The Collaborative International Dictionary of English v.0.48:

Estancia \Es*tan"ci*a\ ([asl]s*t[.a]n"th[-e]*[.a]), n. [Sp. See
   Stanza.]
   A grazing farm; a country house. [Spanish America]
   [1913 Webster]

U.S. Gazetteer Places (2000):

Estancia, NM -- U.S. town in New Mexico
   Population (2000):    1584
   Housing Units (2000): 487
   Land area (2000):     5.704909 sq. miles (14.775646 sq. km)
   Water area (2000):    0.022047 sq. miles (0.057101 sq. km)
   Total area (2000):    5.726956 sq. miles (14.832747 sq. km)
   FIPS code:            25380
   Located within:       New Mexico (NM), FIPS 35
   Location:             34.760380 N, 106.060748 W
   ZIP Codes (1990):     87016
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Estancia, NM
    Estancia