Union, Illinois, is a small village in McHenry County with a population of around 580 as of the 2020 census. Known for its quaint, rural charm, Union is home to the McHenry County Historical Society and Museum, which preserves the area’s rich history, including its agricultural roots and early settler heritage. The village is also famous for hosting the Illinois Railway Museum, one of the largest railway museums in the United States, attracting visitors with its extensive collection of historic trains and interactive exhibits. Surrounded by rolling farmland, Union offers a peaceful, small-town atmosphere with easy access to nearby urban centers like Chicago, making it a hidden gem for those seeking a blend of history and tranquility.

Union currently has 5 single family homes for sale with an average list price of $709,980 and 13 lots for sale with an average list price of $100,300. The average annual property tax for Union is $5,697.36.