Lisbon is a locality located in western Howard County in the state of Maryland in the United States, located roughly between Baltimore and Frederick and north of Washington, D.C.. It is roughly one square mile. Lisbon is located along Interstate 70 and Maryland Route 144 and is home to the first traffic circle in Maryland. The above photograph is the National Road, looking East toward Baltimore. The road between the two houses runs north 2 miles to Woodbine, where the Patapsco River and the B&O Railroad cross the road. About one mile north of Lisbon exists the original road that ran from Baltimore to Fredrick. This road runs west toward Poplar Springs and east toward Sykesville. The exact route of this road is not discernible at this time.