Unio may refer to:
*
''Unio'' (bivalve), a genus of freshwater mussels
*
''Unio'' (sternwheeler), a steamboat that operated in Oregon, United States, in 1861, before being renamed ''Union''
*
UNI/O, an asynchronous serial bus
*
UNIO Satu Mare, a Romanian machine-building company
* or Confederation of Unions for Professionals, a national trade union center in Norway
See also
*
Unio Mystica, the union of the individual human soul with the Godhead
*
Unio Trium Nationum, a 1438 pact formed by the three Estates of Transylvania
*
Convergència i Unió, a political party in Catalonia
*
Unió Democràtica de Catalunya, a political party in Catalonia
*
Unió Valenciana
Valencian Union ( ca-valencia, Unió Valenciana; es, Unión Valenciana; UV) was a regionalist political party in the Valencian Community, Spain.
The party had not been represented in the Valencian autonomous parliament since 1999. It scored ...
, a political party in Valencia
*
Unió Mallorquina, a political party on Majorca
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