The Charles Street Trolley is a proposed streetcar line running through northern portions of Baltimore, Maryland, United States.

Kittelson & Associates, Inc., a consulting firm hired by trolley advocates, estimates that the line would be likely to carry 2.5 million riders per year.

[2] A second group, known as Friends of the Trolley is also backing the project; it was reported in November 2011 that FotT had hired a community organizer.

[4] A website for what appears to be a third group—the Baltimore Streetcar Campaign—is also active in advocating for a Charles Street trolley plan.

[5] While the proposed trolley is not a project of the MTA, the two groups have expressed a willingness to work together on certain elements of a transit plan for the area involved.