$USDC USDC (USD Coin) is a stablecoin pegged 1:1 to the U.S. dollar. It is issued by Circle in partnership with Coinbase and runs on multiple blockchain networks, including Ethereum, Solana, and Avalanche. USDC is backed by cash and short-term U.S. government bonds, making it a widely used digital dollar for payments, trading, and DeFi applications.