The Collaborative International Dictionary of English v.0.48:

Cottonwood \Cot"ton*wood`\ (-w[oo^]d`), n. (Bot.)
   An American tree of the genus Populus or poplar, having the
   seeds covered with abundant cottonlike hairs; esp., the
   Populus monilifera and Populus angustifolia of the
   Western United States.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cottonwood
    n 1: any of several North American trees of the genus Populus
         having a tuft of cottony hairs on the seed
    2: American basswood of the Allegheny region [syn: white
       basswood, cottonwood, Tilia heterophylla]

U.S. Gazetteer Counties (2000):

Cottonwood -- U.S. County in Minnesota
   Population (2000):    12167
   Housing Units (2000): 5376
   Land area (2000):     639.993544 sq. miles (1657.575598 sq. km)
   Water area (2000):    8.914761 sq. miles (23.089123 sq. km)
   Total area (2000):    648.908305 sq. miles (1680.664721 sq. km)
   Located within:       Minnesota (MN), FIPS 27
   Location:             43.990742 N, 95.170319 W
   Headwords:
    Cottonwood
    Cottonwood, MN
    Cottonwood County
    Cottonwood County, MN


U.S. Gazetteer Places (2000):

Cottonwood, AZ -- U.S. city in Arizona
   Population (2000):    9179
   Housing Units (2000): 4427
   Land area (2000):     10.669469 sq. miles (27.633796 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    10.669469 sq. miles (27.633796 sq. km)
   FIPS code:            16410
   Located within:       Arizona (AZ), FIPS 04
   Location:             34.732145 N, 112.018565 W
   ZIP Codes (1990):     86326
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, AZ
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood-Verde Village, AZ -- U.S. Census Designated Place in Arizona
   Population (2000):    10610
   Housing Units (2000): 4290
   Land area (2000):     8.765263 sq. miles (22.701927 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    8.765263 sq. miles (22.701927 sq. km)
   FIPS code:            16485
   Located within:       Arizona (AZ), FIPS 04
   Location:             34.708402 N, 111.992498 W
   ZIP Codes (1990):     86326
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood-Verde Village, AZ
    Cottonwood-Verde Village
    Cottonwood, AZ
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood, CA -- U.S. Census Designated Place in California
   Population (2000):    2960
   Housing Units (2000): 1131
   Land area (2000):     2.392595 sq. miles (6.196792 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    2.392595 sq. miles (6.196792 sq. km)
   FIPS code:            16630
   Located within:       California (CA), FIPS 06
   Location:             40.388953 N, 122.281823 W
   ZIP Codes (1990):     96022
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, CA
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood, CO -- U.S. Census Designated Place in Colorado
   Population (2000):    931
   Housing Units (2000): 340
   Land area (2000):     0.881271 sq. miles (2.282481 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.881271 sq. miles (2.282481 sq. km)
   FIPS code:            17492
   Located within:       Colorado (CO), FIPS 08
   Location:             39.559498 N, 104.800579 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, CO
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood, ID -- U.S. city in Idaho
   Population (2000):    944
   Housing Units (2000): 398
   Land area (2000):     0.830686 sq. miles (2.151468 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.830686 sq. miles (2.151468 sq. km)
   FIPS code:            18640
   Located within:       Idaho (ID), FIPS 16
   Location:             46.052231 N, 116.350655 W
   ZIP Codes (1990):     83522
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, ID
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood, AL -- U.S. town in Alabama
   Population (2000):    1170
   Housing Units (2000): 548
   Land area (2000):     5.495642 sq. miles (14.233647 sq. km)
   Water area (2000):    0.016166 sq. miles (0.041869 sq. km)
   Total area (2000):    5.511808 sq. miles (14.275516 sq. km)
   FIPS code:            17824
   Located within:       Alabama (AL), FIPS 01
   Location:             31.053646 N, 85.302409 W
   ZIP Codes (1990):     36320
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, AL
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood, SD -- U.S. town in South Dakota
   Population (2000):    6
   Housing Units (2000): 5
   Land area (2000):     0.921574 sq. miles (2.386866 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.921574 sq. miles (2.386866 sq. km)
   FIPS code:            14220
   Located within:       South Dakota (SD), FIPS 46
   Location:             43.966333 N, 101.905478 W
   ZIP Codes (1990):     57775
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, SD
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood, TX -- U.S. city in Texas
   Population (2000):    181
   Housing Units (2000): 69
   Land area (2000):     1.545714 sq. miles (4.003380 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.545714 sq. miles (4.003380 sq. km)
   FIPS code:            17200
   Located within:       Texas (TX), FIPS 48
   Location:             32.463437 N, 96.389931 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, TX
    Cottonwood


U.S. Gazetteer Places (2000):

Cottonwood, MN -- U.S. city in Minnesota
   Population (2000):    1148
   Housing Units (2000): 481
   Land area (2000):     0.857385 sq. miles (2.220617 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.857385 sq. miles (2.220617 sq. km)
   FIPS code:            13564
   Located within:       Minnesota (MN), FIPS 27
   Location:             44.608666 N, 95.673031 W
   ZIP Codes (1990):     56229
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cottonwood, MN
    Cottonwood