Page "Anne Arundel County, Maryland" Paragraph 9

On May 22, 1830, the inaugural horse-drawn train of the B & O Railroad travelled the of the newly-completed track from Mount Clare Station in Baltimore City to Ellicott Mills in Anne Arundel County.

This was the first regular railroad passenger service in the United States.

In 1831, Land West of the railroad was considered the Howard District of Anne Arundel County.

In 1851, The Howard district was broken off to form Howard County, the 21st county in Maryland.