According to the United States Census Bureau, the town has a total area of 0.80 square miles (2.07 km2), all land.

To accommodate travelers along this important colonial road, Nicholas Hall tried to plat the town of New Market in 1788.

He likely had disputes with William Plummer, an owner of adjoining land and was unable to complete the project.

Residents developed churches, hotels, inns, a post office, taverns, blacksmith shops, and other crucial services, including doctors.

[6] Downtown New Market once had a number of small shops specializing in the sale of antiques and other goods.

[citation needed] While antiques tourism occurs year-round, New Market holds events and festivals that highlight the town's historic past.

From June through October each year, New Market hosts periodic 2nd Saturday events, featuring artists, food, vendors, free concerts, and movies.

The main highway serving New Market is Interstate 70 and U.S. Route 40, which run concurrently through the town.

Maryland Route 75 also serves New Market, connecting northward to Libertytown and south to Hyattstown.