In the 1930 United States census, Michigan was recorded as having a population of 4,842,325, ranking as the seventh most populous state in the country. By 1940, Michigan's population had increased by 8.5% to 5,256,106.
Cities
The following is a list of cities in Michigan with a population of at least 20,000 based on 1930 U.S. Census data. Historic census data from 1920 and 1940 is included to reflect trends in population increases or decreases. Cities that are part of the Detroit metropolitan area are shaded in tan.
The following is a list of counties in Michigan with populations of at least 50,000 based on 1930 U.S. Census data. Historic census data from 1920 and 1940 are included to reflect trends in population increases or decreases.
Harmsworth Cup – On September 1, Gar Wood won the Harmsworth Cup driving the Miss America IX on the Detroit River with a record average speed of 77.390 miles per hour.[16]
January 26 - Thomas Gumbleton, auxiliary bishop of Detroit known for his anti-war protests during Vietnam War and his advocacy on behalf of homosexuals, in Detroit
February 26 - Tom Saidock, football player at Michigan State and in the NFL, in Detroit
February 28 - Robert John Rose, Roman Catholic Bishop of Gaylord (1981–89) and Grand Rapids (1989–2003), in Grand Rapids
March 9 - Thomas Schippers, conductor known for his work with the New York Philharmonic, Chicago Symphony Orchestra, Cincinnati Symphony Orchestra, and Metropolitan Opera, in Kalamazoo
March 28 - Robert Ashley, composer best known for his operas and other theatrical works, many of which incorporated electronics and extended techniques, in Ann Arbor
April 23 - Larry Twitchell, Major League Baseball pitcher, compiled an 11-1 record for the National League champion Detroit Wolverines in 1887 while batting .333, at age 68 in Cleveland[23]
May 26 - David D. Aitken, U.S. Congressman (1893-1897) and Mayor of Flint (1904-1905), at age 76 in Flint[24]
May 31 - Gaspar Milazzo, aka Gaspari Lombardo, a major organized-crime figure in Detroit during the Prohibition era, in a barrage of shotgun blasts at the Vernor Highway Fish Market in Detroit[25]
October 15 - Herbert Henry Dow, inventor of chemical processes, compounds, and products, and founder of Dow Chemical, at the Mayo Clinic in Rochester, Minnesota[26]
October 24 - Joseph Boyer, businessman who moved the Burroughs Adding Machine Company from St. Louis to Detroit, in Detroit[27]
December 8 - Julius Rolshoven, painter and Detroit native, at age 72 at St. Luke's Hospital in New York City[28]
December 20 - Gerrit J. Diekema, U.S. Congressman (1885-1891), at age 71 at The Hague, Netherlands[29]