Courtyard by Marriott Downtown Portland Video July 27, 2015 | Daniel SGS Loading Map.... Courtyard by Marriott Downtown Portland321 Commercial St. Portland, ME, 04101 43.6527086 -70.25631249999998 ADDRESS Courtyard by Marriott Downtown Portland 321 Commercial St. Portland, ME, 04101 United States PHONE 207-274-6296 Upcoming Events No events in this location