Stuart Malcolm McGregor, journalist and author, was born on February 24, 1892, at Coleman, Texas, the son of Jesse and Gabriella Baldwin (Edwards) McGregor. After graduating from Coleman High School in 1910, he entered the University of Texas, where he received a B.A. degree in 1914 and a master's of journalism in 1915, the first degree granted by the UT School of Journalism. That same year he was editor of the Daily Texan, the student newspaper. McGregor worked on the Austin American and Austin Statesman before entering the aviation branch of the United States Navy during World War I, during which he held the rank of ensign. He moved to Dallas in 1919 to join the Texas Chamber of Commerce as its director of public relations and statistician. He became a member of the staff of the Dallas Morning News on January 1, 1923, and remained with it and its affiliated Texas Almanac until his retirement in 1961. He was married in 1923 to Louise Merritt Lawrence of Dallas, and they had one son.
From 1925 through the 1961–62 edition, McGregor compiled and edited the Texas Almanac, coedited the agriculture and business pages of the Dallas Morning News, and was associate editor of its editorial page. In 1960 he was chosen as the first living member of the Journalism Hall of Fame at the University of Texas. He was cited in 1961 by the Southwestern Journalism Forum at Southern Methodist University for his thirty-seven years of outstanding service to Texas as editor of the Almanac. In 1962 he won the McMurray Award of the Texas Institute of Letters for outstanding service to Texas writers and researchers. He served as a vice president of the Texas State Historical Association, which in 1944 elected him a fellow. He was a member of the Texas Academy of Science, the Philosophical Society of Texas, the Texas Institute of Letters, and the Critic Club of Dallas. Besides his newspaper and yearbook work, his writings included articles for the Southwestern Historical Quarterly, the Encyclopædia Britannica, the Economist (London), and other publications. He died in Dallas on March 14, 1963, and was buried in Hillcrest Memorial Cemetery.