Cryptocurrency exchanges are platforms where users can buy, sell, and trade digital assets. In the United States, there are several approved cryptocurrency exchanges that are regulated by the government and operate within the legal framework. Some of the most popular and trusted cryptocurrency exchanges in the US include Coinbase, Gemini, Kraken, Binance.US, and Bitstamp.

Coinbase is one of the largest and most well-known cryptocurrency exchanges in the US. It was founded in 2012 and is regulated by the US government. Coinbase allows users to buy, sell, and trade a wide range of cryptocurrencies, including Bitcoin, Ethereum, and Litecoin.

Gemini is another popular cryptocurrency exchange in the US. It was founded in 2014 by the Winklevoss twins and is regulated by the New York State Department of Financial Services. Gemini offers a secure platform for buying, selling, and trading cryptocurrencies.

Kraken is a US-based cryptocurrency exchange that was founded in 2011. It is one of the oldest and most trusted exchanges in the industry. Kraken offers a wide range of trading pairs and allows users to trade cryptocurrencies with fiat currencies.

Binance.US is the US-based arm of Binance, one of the largest cryptocurrency exchanges in the world. Binance.US was launched in 2019 and is regulated by the US government. It offers a wide range of cryptocurrencies for trading and has a user-friendly interface.

Bitstamp is a European cryptocurrency exchange that has a strong presence in the US. It was founded in 2011 and is regulated by the Luxembourg Financial Industry Supervisory Commission. Bitstamp offers a secure platform for buying, selling, and trading cryptocurrencies.

These are just a few of the approved cryptocurrency exchanges in the United States. It is important for users to do their own research and choose a reputable exchange that complies with regulations and offers a secure trading environment.