The University of Michigan Ross School of Business (branded as Michigan Ross) is the business school of the University of Michigan, a public research university in Ann Arbor, Michigan.

The school was originally established in 1924 as the School of Business Administration. Today, it offers bachelor's, master's, and doctoral degrees, as well as an executive education program. Michigan Ross also collaborates with other colleges and schools at the University of Michigan to offer dual degree programs. Additionally, the school's Executive Education program includes a Distinguished Leader Certificate. Michigan Ross maintains the tenth largest endowment among all business schools in the United States, with a total of $435 million as of 2016.

The first business courses were offered at the University of Michigan in 1900. Economics Department Chairman Henry Carter Adams oversaw the expanding practical courses to prepare students for business careers. The idea for the school came from the economics department. In 1918, the university's College of Literature, Science, and the Arts began issuing a Certificate of Business Administration. In 1923, University President Marion LeRoy Burton hired Edmund Ezra Day to serve as the founding dean of a new business school.

The University of Michigan School of Business Administration was founded in 1924; it offered a two-year Master of Business Administration after three years of general studies. There were 14 faculty members, including one of the first women to be part of a business school. In 1925, the Bureau of Business Research was founded to facilitate and coordinate faculty research and publish research monographs and case studies.

In 1926 after serving three years, Day was replaced as dean by Clare Griffin, who initially came to the university to teach marketing. The same year, faculty member William Andrew Paton founded The Accounting Review. In 1935, the school began offering a PhD in Business Administration. In 1938, the first evening Master of Business Administration (MBA) classes were offered. In 1940, school enrollment reached 200 students. Between 1942 and 1943, a Bachelor of Business Administration (BBA) degree was introduced.

In 1943, Russell Stevenson became the school's third dean. In 1947, enrollment exceeded 1,000 students, reaching 800 BBA students and 400 MBA students by 1949. In 1948, the school opened a new building that cost $2.5 million and had a nine-story tower. The same year, prominent economist Paul McCracken joined the faculty. From 1950 to 1959, the school introduced the Public Utility Executive Program, its first stand-alone, non-degree program for continuing education of business executives.

In 1960, Floyd Bond became the school's fourth dean. The same year, the school launched its first international joint venture in Taiwan and Bond appointed a committee to better integrate global business into the school's curriculum. In 1966, Bond established the Ad Hoc Committee on Educational Programs in Business Administration for Negroes, which tried to attract more African-American students but the initiative and a number of student strikes and other protests in the following years demanded more minority enrollment. In 1971, the school began a $1.5 million expansion of the physical facilities and assembly hall. By 1971, total enrollment exceeded 1,300, more than three-quarters of whom were graduate students with 370 in the Evening MBA Program. In 1972, the school's first two alumni clubs in New York and California, held their first meetings. In 1974, Alfred Edwards joined the faculty as a professor of business administration and director of the research division, later becoming known as the school's ambassador for diversity.

In 1979, Gilbert Whitaker became the school's fifth dean and established an enlarged Office of Development & Alumni Relations. In 1980, total degree-program enrollment reached 2,000, including about 600 BBA students, while the number of faculty members exceeded 100. From 1980 to 1989, Whitaker stablished 17 joint-degree programs with other U-M units. In 1982, he announced a $15 million fundraising campaign for three new buildings, including a library. The campaign raised $17 million, and the buildings opened by 1984. In 1983, the school joined the Consortium for Graduate Study in Management and began offering a Master of Accounting degree. In 1990, the school received a federal grant to establish a Center for International Business Education.