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Reference.org
Union, Ohio
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<p>Union is a city in <a href="/facts/Montgomery_County,_Ohio/1Y1LmTYb">Montgomery</a> and <a href="/facts/Miami_County,_Ohio/QzKm9vgz">Miami</a> Counties in the <a href="/facts/U.S._state/PFwcRIYQ">U.S. state</a> of <a href="/facts/Ohio/YutCnTlh">Ohio</a>. The population was 6,859 at the time of the <a href="/facts/United_States_Census_2020/dTEm5TRr">2020 census</a>. It is part of the <a href="/facts/Dayton,_Ohio/U8kg5Tf1">Dayton</a> <a href="/facts/Greater_Dayton/xcQaUJ6U">Metropolitan Statistical Area</a>. </p>