Of US states I've been to Washington, Oregon, California, Nevada, Arizona, New Mexico, Texas, Oklahoma, ,Kansas, Colorado,Utah, and Idaho. All on trips as a kid when my dad was a truck driver, the only zoo I got to see was the Abilene zoo in Texas.
I've lived in Quebec and British Columbia and have also traveled through Ontario, Manitoba, Saskatchewan and Alberta. In Canada I've been to the Granby zoo, the Vancouver Aquarium and the Greater Vancouver Zoo.
In total, I've been to much fewer zoos than most of the regular posters here, probably.