The recording of history at Trinity Lutheran Church began on February 6, 1927. Eighty Christians, knowledgeable in the teachings of the Lord within the Lutheran tradition, gathered in a vacant store on Main St. Islip, New York, for worship of the Triune God. Desiring for that tradition to continue, this first service marked the beginning of Trinity Lutheran Church.

Trinity's first permanent pastor was installed on July 24, 1927. From then to the present the Lord blessed Trinity with six loving and dedicated pastors, each serving the Lord in his own particular way, but foremost, each proclaiming Christ, and Him Crucified as our Savior. Through our Pastor and God's continuous blessing on Trinity Lutheran Church it is evident in its marvelous growth (numerically, financially, and spiritually) as a truly Christ centered church in the Islip community.