Main ports in the United States and their distributionThere are mainly 48 major seaports in the United States: Atlanta, Baltimore, Birmingham, Boston, Charleston, Charlotte, Chicago, Cincinnati, Cleveland, Columbia, Dallas, Denver, Detroit, El Paso, Houston, Huntsville, Indianapolis, Jacksonville, Kansas City, Laredo, Long Beach, Los Angeles, Louisville, Memphis, Miami, Milwaukee, Minneapolis, Mobile, Nashville, New Orleans, New York, Norfolk, Oakland, Omaha, Orlando, Philadelphia, Phoenix, Pittsburgh, Portland, Salt Lake City, San Antonio, San Francisco, Savannah, Seattle, Tampa, Atlanta.