List of Famous people born in Montana, United States of America

Rosemarie Bowe Stack was an American model, best known for her appearances in several films in the 1950s.

Irving Lerner "Irv" Weissman is a Professor of Pathology and Developmental Biology at Stanford University where he is the Director of the Stanford Institute of Stem Cell Biology and Regenerative Medicine along with Michael Longaker.

John Robert Horner is an American paleontologist most famous for discovering and naming Maiasaura, providing the first clear evidence that some dinosaurs cared for their young. In addition to his paleontological discoveries, Horner served as the technical advisor for all the Jurassic Park films, had a cameo appearance in Jurassic World, and served as a partial inspiration for one of the lead characters of the franchise, Dr. Alan Grant. Horner studied at the University of Montana, although he did not complete his degree due to undiagnosed dyslexia, and was awarded a Doctorate in Science honoris causa. He retired from Montana State University on July 1, 2016 although he claims to have been pushed out of the Museum of the Rockies after having married an undergraduate student and now teaches as a Presidential Fellow at Chapman University.

Raymond Perry Ahlquist was an American pharmacist and pharmacologist. He published seminal work in 1948 that divided adrenoceptors into α- and β-adrenoceptor subtypes. This discovery explained the activity of several existing drugs and also laid the ground work for new drugs including the widely prescribed beta blockers.

Patrick M. Hughes is a retired United States Army officer who served as the 12th Director of the Defense Intelligence Agency (DIA). Previously, he was Director of Intelligence for the US Joint Chiefs of Staff from 1994 to 1996 and the Director of Intelligence at United States Central Command from 1992–1994. He was the Commanding General, United States Army Intelligence Agency, and the Assistant Deputy Chief of Staff for Intelligence, U.S. Army from 1990 until 1992. He joined the United States Department of Homeland Security in 2003 as the Assistant Secretary for Information Analysis (Intelligence), and departed from DHS and Government service in March 2005.

James Grady is an American writer and investigative journalist known for his thriller novels on espionage, intrigue, and police procedurals.

Brian Paul Schmidt is the Vice-Chancellor of the Australian National University (ANU). He was previously a Distinguished Professor, Australian Research Council Laureate Fellow and astrophysicist at the University's Mount Stromlo Observatory and Research School of Astronomy and Astrophysics. He is known for his research in using supernovae as cosmological probes. He currently holds an Australia Research Council Federation Fellowship and was elected a Fellow of the Royal Society (FRS) in 2012. Schmidt shared both the 2006 Shaw Prize in Astronomy and the 2011 Nobel Prize in Physics with Saul Perlmutter and Adam Riess for providing evidence that the expansion of the universe is accelerating, making him the only Montana-born Nobel laureate.

Leroy "Lee" Edward Hood is an American biologist who has served on the faculties at the California Institute of Technology (Caltech) and the University of Washington. Hood has developed ground-breaking scientific instruments which made possible major advances in the biological sciences and the medical sciences. These include the first gas phase protein sequencer (1982), for determining the amino acids that make up a given protein; a DNA synthesizer (1983), to synthesize short sections of DNA; a peptide synthesizer (1984), to combine amino acids into longer peptides and short proteins; the first automated DNA sequencer (1986), to identify the order of nucleotides in DNA; ink-jet oligonucleotide technology for synthesizing DNA and nanostring technology for analyzing single molecules of DNA and RNA.

Frank L. VanderSloot is an American entrepreneur, radio network owner, rancher, and political campaign financier. He is the founder and chief executive officer of Melaleuca, Inc. His other business interests include the Riverbend Ranch and Riverbend Communications. VanderSloot also serves on the board of directors and executive board of the U.S. Chamber of Commerce. In 2011, the Land Report listed him as the nation's 92nd largest landowner. In 2017, Forbes listed VanderSloot as the richest person in Idaho and the 302nd wealthiest American with a net worth of $2.7 billion.

Raymond Gerhardt Hunthausen was an American prelate of the Catholic Church. He served as Bishop of Helena from 1962 to 1975 and as Archbishop of Seattle from 1975 to 1991. He was the last surviving American to have participated as a bishop in the Second Vatican Council.