Where to Find and Catch Mienfoo
From Pokemon Go Wiki
Mienfoo are found and captured in Nest and Habitat locations.
Nests
Mienfoo Nests are locations that consistently spawn Mienfoo.
Habitats
Mienfoo Habitats are spawn locations where Mienfoo 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: