To open a U.S. bank account for your Nigerian-founded, U.S.-incorporated startup, ensure your business is registered in the U.S. and has an EIN. While there are no residency requirements, most banks require an in-person visit for document submission, although some specialist banks might allow online completion. Key documents needed include photo ID, incorporation articles, EIN letter, and personal and business address proofs. Major banks like JP Morgan Chase, Bank of America, Citibank, and Wells Fargo are recommended options. It's advisable to contact various banks to understand their specific services and requirements for international clients.