St. Valentin is the common name for the Catholic parish church and Basilica minor Basilica of SS Dionysius and Valentinus in Kiedrich in the Rheingau, in Hesse, Germany. It was built at the end of the 15th century in the Gothic style. Its organ is one of the oldest playable organs in Germany. The church was a pilgrimage destination for people with epilepsy and therefore has notable carved wooden laity stalls, including one decorated with the "Gerechtigkeitsspirale".

Kiedrich is a municipality in the Rheingau-Taunus-Kreis in the Regierungsbezirk of Darmstadt in Hesse, Germany.