The Erfurt Union (German: Erfurter Union) was a short-lived union of German states under a federation, proposed by the Kingdom of Prussia at Erfurt, for which the Erfurt Union Parliament (Erfurter Unionsparlament), lasting from March 20 to April 29, 1850, was opened at the former Augustinian monastery in Erfurt.
Uniunea de la Erfurt (germană: Erfurter Union) a fost o uniune de scurtă durată a statelor germane într-o federație propusă de Regatul Prusiei la Erfurt, Parlamentul Uniunii de la Erfurt (Erfurter Unionsparlament) a durat între 20 martie și 29 aprilie 1850.