Unionville is the name of some places in North America:

Canada

• Unionville, Ontario
  • Unionville GO Station, a station in the GO Transit network located in the community
  • South Unionville, a community in Markham, Ontario

United States

• Unionville, Connecticut
• Unionville, Georgia
• Unionville, Illinois (disambiguation)
• Unionville, Indiana
• Unionville, Iowa
• Unionville, Frederick County, Maryland
• Unionville, Michigan
• Unionville, Missouri
• Unionville, Nevada
• Unionville, New Jersey
  • Unionville Vineyards, a winery in Unionville.
• Unionville, New York (disambiguation) (multiple)
• Unionville, North Carolina
• Unionville, Ashtabula County, Ohio; on the border with Lake County
• Unionville, Columbiana County, Ohio
• Unionville, Holmes County, Ohio
• Unionville, Morgan County, Ohio
• Unionville, Washington County, Ohio
• Unionville Center, Ohio
• Unionville, Pennsylvania (disambiguation) (multiple)
• Unionville, South Carolina, historic settlement now named Union, South Carolina
• Unionville, Tennessee
• Unionville, Utah, historic settlement now renamed Hoytsville, Utah