Initially the group gathered for Mass at a German Catholic Church in New Haven but in 1900, they began to make plans for a location of their own.

A delegation from the St. Stanislaus Society petitioned Most Reverend Michael Tierney of the Hartford Diocese for permission to organize a parish.

Father Musiel celebrated the first Mass for the newly founded parish in a German hall on Wooster Street.

Most Reverend Michael Tierney, Bishop of Hartford, dedicated the church on Decoration Day in 1905 and placed it under the patronage of St. Stanislaus.

On Decoration Day in 1912, Most Reverent John Joseph Nilan, Bishop of Hartford, blessed the cornerstone of the new church, designed in the Polish Cathedral style.

In 1925, the pastor, Reverend Joseph Janowski, CM, commissioned artist P. Mazur to paint the many frescoes on the interior of the church.

In 1942 the pastor, Reverend Karol Pacherski, CM, commissioned Vincent Murdo of New Haven to beautify the interior of the church.

The last major renovation in the church took place in anticipation of the 100 year anniversary of the parish by then pastor, Reverend Waclaw Hlond, CM.

[citation needed] In September 2009, a regularly scheduled traditional Latin mass hosted by the St. Gregory Society of New Haven was commenced.

As part of the reorganization, the Vincentian Fathers left St. Stanislaus at the end of 2021, and diocesan priests were assigned to administer the parish.