Where to Find and Catch Zangoose
From Pokemon Go Wiki
Zangoose are found and captured in Nest and Habitat locations.
Nests
Zangoose Nests are locations that consistently spawn Zangoose.
Habitats
Zangoose Habitats are spawn locations where Zangoose is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: