The Parish of the Holy Trinity was founded on 1 July 2009, when the ecclesial communities of St. Mary's Parish (1990) Hudson [itself a merged parish comprising: St. Mary's Roman Catholic Church (1848) Hudson; Our Lady of Mount Carmel Church (1908) Hudson; and Sacred Heart/Our Lady of Perpetual Help Church (1916) Hudson] and Church of the Resurrection (1922) Germantown; together with it’s mission, Nativity Chapel (1925) Linlithgo, were united in faith, hope, and charity to carry on Christ's mission in Southwestern Columbia County.