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John S. Siemianowski

b. 1960

Mexican-American bishop

Catholic priest Catholic bishop
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About John S. Siemianowski

Born 1960. John S. Siemianowski is an American catholic priest and catholic bishop.

John Steven Siemianowski (born May 26, 1960) is an American prelate of the Roman Catholic Church who has been serving as an auxiliary bishop for the Archdiocese of Chicago in Illinois since 2025

Early life John Siemianowski was born in Chicago on May 26, 1960, to Lydia and Joseph Siemianowski. As a teenager, he attended Morton East High School in Cicero, Illinois. He earned a Bachelor of Science degree in environmental sciences and a Secondary Education Certificate in 1982 from Southern Illinois University at Edwardsville. Deciding to become a priest, Siemianowski in 1984 entered University of St. Mary of the Lake Mundelein Seminary in Mundelein, Illinois. He received a Master of Divinity degree and a Baccalaureate in Sacred Theology degree in 1989.

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Important facts

Born
26 May 1960, Chicago
Birth century
20th century
Occupation
Catholic priest, Catholic bishop
Nationality
United States
Positions held
Auxiliary bishop, Titular bishop

People in John S. Siemianowski's life

Named in this biography and alive at the same time

Portrait of John
John
1881 – 1963
Latin Catholic priest

Contemporaries

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Frequently asked questions

Who is John S. Siemianowski?

Mexican-American bishop

When was John S. Siemianowski born?

John S. Siemianowski was born on 26 May 1960 in Chicago.

What is John S. Siemianowski's occupation?

John S. Siemianowski is a catholic priest and catholic bishop.

What nationality is John S. Siemianowski?

John S. Siemianowski is American.

Sources & further reading

· Wikipedia: John S. Siemianowski

· Wikidata: Q131519604

· DBpedia: John S. Siemianowski

Cite this page

APA: Biography.guide. (2026). John S. Siemianowski. https://biography.guide/john-s-siemianowski/

MLA: "John S. Siemianowski." Biography.guide, https://biography.guide/john-s-siemianowski/.

Chicago: "John S. Siemianowski." Biography.guide. https://biography.guide/john-s-siemianowski/.

Data last updated: 2026-09-20 · Spot an error? Report a correction.

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