Isaac Lea Nicholson (January 18, 1844 โ October 29, 1906) was an American Episcopal prelate. He was the fifth Bishop of Milwaukee, serving from 1891 until his death.
In 1891, Nicholson was elected Bishop of Milwaukee. Nicholson's consecration took place in Saint Mark's Church, Philadelphia on October 28, 1891. He had a heart attack in 1905, and a coadjutor bishop was elected to assist him. Nicholson was an influential Anglo-Catholic in the Episcopal Church, and championed the Catholic heritage of the church.[5] In 1883, he was elected as Bishop of Indiana but he declined. He died in office on October 29, 1906.