The Westminster Historic District comprises the historic center of Westminster, Maryland. The district includes about 1400 structures, with a high proportion of contributing structures. The town exhibits a variety of building styles and notable examples of Greek Revival, Georgian, and Gothic Revival style architecture. Most of the structures exhibit early 19th-century residential vernacular architecture and mid-19th century commercial architecture.

It was listed on the National Register of Historic Places in 1980.

• Westminster Historic District, Carroll County, including photo in 2006, at Maryland Historical Trust
• Boundary Map of Westminster Historic District, Carroll County, at Maryland Historical Trust
• Westminster Historic District Commission
• The Building of Westminster in Maryland, a socio-architectural account of Westminster's first 250 years.