I am sure there are more but these are the ones I have found so far.
Alabama
Alabama War Dogs Memorial Foundation
Find out what's happening in Algonquin-Lake In The Hillswith free, real-time updates from Patch.
California
Find out what's happening in Algonquin-Lake In The Hillswith free, real-time updates from Patch.
Rancho Coastal Humane Society (RCHS)
Illinois
Northern Illinois Police K9 Memorial
http://www.cpwda.com/k9_monuments.htm
Michigan
Michigan War Dog Memorial
http://www.youtube.com/watch?v=Hw5XolcL6Mc
New Jersey
Dedication of the US War Dogs Memorial, State of New Jersey.
Located at the Vietnam Veterans' Memorial, Holmdel, New Jersey
http://www.uswardogs.org/us-war-dog-memorial/
New York
Hartsdale Pet Cemetery
& Crematory
America's First and Most Prestigious Pet Burial Grounds
http://www.petcem.com/wardogmemorial.html
Pennsylvania
Bristol Township, Pennsylvania
Tennessee
University of Tennessee College of Veterinary Medicine War Dog Memorial
http://www.vet.utk.edu/wardog/
NATIONAL MONUMENT SITE
JBMF, Inc. in coordination with the Offices of the Secretary of Defense and
Secretary of the U.S. Air Force has officially selected Lackland Air Force
Base, San Antonio, Texas
as the location to build the National Monument for Military Working Dog Teams.
Memorial Locator
War Dogs…America’s Forgotten Heroes
War Dog Memorial
http://www.findagrave.com/cgi-bin/fg.cgi?GRid=14798700&page=gr