How many animals are euthanized each year in the US?
About 3 to 4 million.
There are between 3 to 4 million animals euthanized in animal shelters each year. This is according to an estimate released by the Humane Society of the United States on November 23, 2009. The American Humane Association concurs this number, placing their estimated number of euthanized animals at approximately 3.7 million.