The Collaborative International Dictionary of English v.0.48:

Paducahs \Pa*du"cahs\ (p[.a]*d[=u]"k[.a]z), n. pl.; sing.
   Paducah (-k[.a]). (Ethnol.)
   See Comanches.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Paducah
    n 1: a town in western Kentucky on the Ohio River

U.S. Gazetteer Places (2000):

Paducah, KY -- U.S. city in Kentucky
   Population (2000):    26307
   Housing Units (2000): 13221
   Land area (2000):     19.483717 sq. miles (50.462592 sq. km)
   Water area (2000):    0.022139 sq. miles (0.057341 sq. km)
   Total area (2000):    19.505856 sq. miles (50.519933 sq. km)
   FIPS code:            58836
   Located within:       Kentucky (KY), FIPS 21
   Location:             37.072226 N, 88.627436 W
   ZIP Codes (1990):     42001 42003
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Paducah, KY
    Paducah


U.S. Gazetteer Places (2000):

Paducah, TX -- U.S. town in Texas
   Population (2000):    1498
   Housing Units (2000): 820
   Land area (2000):     1.520756 sq. miles (3.938740 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.520756 sq. miles (3.938740 sq. km)
   FIPS code:            54600
   Located within:       Texas (TX), FIPS 48
   Location:             34.013957 N, 100.303780 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Paducah, TX
    Paducah