The crypto exchanges available for trading depend on the country you reside in. Below you will find links to each exchange's page listing the countries they accept users from.
For users in the United States, there are three options, although not all exchanges are available in every state: Coinbase Advanced, Binance US, and Kraken. Check if your state allows trading via these exchanges.
If an exchange does not list your country as prohibited or allowed, you can most likely trade on that exchange.
Available exchanges and supported regions
Bitfinex available jurisdictions [Deprecated]
Poloniex available jurisdictions [Deprecated]
