What bitcoin exchanges are based in the USA? What are the names and Web site addresses of popular bitcoin exchanges based in the USA?  These exchanges should support account funding via ACH transfers from US bank accounts.
I might have missed a few, but here are the main ones based in the USA:


Coinbase (not really an exchange)
GDAX (part of Coinbase)
Poloniex
Gemini


Mind you that many other exchanges based out of other countries are just as likely to accept funding via ACH.