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Waldo E. Koop

1920 – 1990

American writer and historian

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About Waldo E. Koop

Lived 1920 – 1990 (aged 70). Waldo E. Koop was an American.

Waldo E. Koop (1920–1990) was a writer on the history of the American West, a researcher, and author of publications about Billy the Kid and "Rowdy Joe" Lowe.

Family

Waldo E. Koop was the son of John K. Koop and Katie Schmidt of Harvey County, Kansas. His father was a store keeper for a railroad, and his mother operated a laundry at home. He married Bette J. Young.

Career

As a career, Waldo E. Koop was an engineer for Boeing. He was called one of the nation's finest researchers by local and state historians, and was credited in the series of Time Life books on the Old West for his research on gunfighters. Koop discovered that Henry McCarty, later known as Billy the Kid, spent time in Wichita, Kansas, where he saw his first gunfight. He published his findings in 1965 in the book, Billy the Kid: the Trail of a Kansas Legend.

Publications

Billy the Kid, The Trail of a Kansas Legend (Trail Guide), by Waldo E. Koop, 1965 Rowdy Joe Lowe: Gambler With a Gun, by Joseph G. Rosa and Waldo E. Koop, Oct. 1989 Book Review: ENCYCLOPEDIA OF WESTERN GUNFIGHTERS, The Journal of Arizona History, Vol. 20, No. 4, by Waldo E. Koop, 1979 Waldo Koop Research Collection, by Waldo E. Koop, 1965-1990

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Important facts

People in Waldo E. Koop's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Waldo E. Koop's

Frequently asked questions

Who was Waldo E. Koop?

American writer and historian

When was Waldo E. Koop born?

Waldo E. Koop was born on 23 March 1920 in Kansas.

When did Waldo E. Koop die?

Waldo E. Koop died on 23 April 1990 in Kansas.

What nationality was Waldo E. Koop?

Waldo E. Koop was American.

Sources & further reading

· Wikipedia: Waldo E. Koop

· Wikidata: Q27058299

· DBpedia: Waldo E. Koop

Cite this page

APA: Biography.guide. (2026). Waldo E. Koop. https://biography.guide/waldo-e-koop/

MLA: "Waldo E. Koop." Biography.guide, https://biography.guide/waldo-e-koop/.

Chicago: "Waldo E. Koop." Biography.guide. https://biography.guide/waldo-e-koop/.

Data last updated: 2026-09-22 · Spot an error? Report a correction.

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