The July 13 attack occurred near Gay Road and test results returned this week confirmed the animal had rabies, said Pam Tucker, director of the county’s Emergency & Operations Division.
It is the second confirmed rabies case in the county this year.
The first incident, also near Harlem, occurred in April and also involved a rabid raccoon attacking a dog.
In both cases, the dogs involved did not have current vaccinations – and both had to be euthanized.
Health officials have tested 14 suspicious animals so far this year, but only two yielded positive results for rabies.