If we go by the list of Top USA Metropolitan Statistical Areas (MSAs),
Table of United States Metropolitan Statistical Areas - Wikipedia, the free encyclopedia,
here's what I find:
#12 - Riverside/San Bernardino/Ontario, CA 4.30 million
I think all they have is The Living Desert, and I'm not sure it's in this MSA
#30 - Las Vegas/Paradise, NV 1.97 million
Southern Nevada Zoological-Biological Park -- I've not heard much good about it
#31 - San Jose/Sunnyvale/Santa Clara, CA 1.87 million
Has Happy Hollow Zoo -- not much for a big city
#33 - Charlotte/Gastonia/Rock Hill, NC/SC 1.80 million
#34 - Austin/Round Rock/San Marcos, TX 1.78 million
Has the Austin Zoo, not even AZA accreditted
#44 - Richmond, VA 1.27 million
Anyone know anything about the Metro Richmond Zoo?
#45 - Hartford, CT 1.21 million
Beardsley Zoo (in Bridgeport) is in another MSA
#47 - Raleigh/Cary, NC 1.16 million
#51 - Rochester, NY 1.06 million
Seneca Park Zoo -- I've never seen it, is it any good?
#59 - Albany/Schenectady/Troy, NY 0.87 million
It's been discussed here:
http://www.zoochat.com/22/why-doesnt-albany-ny-area-have-225818/
#60 - New Haven/Milford, CT 0.86 million
See Hartford above
#61 - Bakersfield/Delano, CA 0.85 million
California Living Museum -- is this good enough?
#62 - Dayton, OH 0.85 million
not that far from the great and famous Cincinnati Zoo
#64 - Allentown/Bethlehem/Easton, PA 0.82 million
Lehigh Valley Zoo?
#67 - Worcester, MA 0.80 million
Southwick's Zoo?
#73 - Sarasota/Bradenton/North Port, FL 0.70 million
Sarasota Jungle Gardens?
I'll stop there, at the Top 75, and all MSAs over 0.7 million.