Rainier Motor Car Company was an American automobile manufacturer founded in 1905 by John T. Rainier in Flushing, New York and from 1908 produced in Saginaw, Michigan. The company specialized in manufacturing large and luxurious automobiles. In 1909, the company was bought by General Motors who maintained the brand until 1911.

Saginaw is a city in and the seat of Saginaw County, Michigan, United States. The city proper had a population of 44,202 at the 2020 census. Located along the Saginaw River, Saginaw is adjacent to Saginaw Charter Township and considered part of Greater Tri-Cities region of Central Michigan. The Saginaw metropolitan area had a population of 190,124 in 2020. The city is also the largest municipality in the Greater Tri-Cities, with a combined population of 377,474 in the combined statistical area in 2020.