Schönholzerswilen was probably a full parish by 1275. However, over the following years it decreased in importance and by 1508 the village church was just a filial church under the parish of Bussnang. When the parish of Bussnang converted during the Protestant Reformation, the abbot of St. Gallen forced Schönholzerswilen to remain Catholic. Schönholzerswilen remained Catholic until 1677. In 1718 they received a priest from Zurich. Zurich continued to appoint the village priest until 1843. Starting in 1820, the Catholics in the village were part of the parish of Wuppenau. This lasted for over thirty years, until in 1854 a Catholic parish was established in the municipality.