List of Famous people with last name Macarthur

John R. "Rick" MacArthur is an American journalist and author of books about US politics. He is the president of Harper's Magazine.

Robert Helmer MacArthur was a Canadian-born American ecologist who made a major impact on many areas of community and population ecology.

Thomas Charles MacArthur is an American former insurance executive and politician. He served as the U.S. Representative for New Jersey's 3rd congressional district from 2015 to 2019. A Republican, MacArthur served on the city council of Randolph, New Jersey, from 2011 through 2013, and as its mayor in 2013. He was elected to the U.S. House of Representatives in 2014.

Arthur MacArthur Sr. was a Scottish American immigrant, lawyer, and judge. He was the fourth Governor of Wisconsin and was an Associate Justice of the Supreme Court of the District of Columbia. He was the father of General Arthur MacArthur Jr., and the grandfather of General Douglas MacArthur. MacArthur is the modern spelling used by his descendants, but in documents from his own time his name was spelled McArthur.