Bay City is a city in the U.S. state of Michigan located near the base of the Saginaw Bay on Lake Huron. As of the 2010 census, the city's population was 34,932, and is the principal city of the Bay City Metropolitan Statistical Area, which is included in the Saginaw-Bay City-Saginaw Township North Combined Statistical Area. The city, along with nearby Midland and Saginaw, form the "Tri-Cities" region, which has more recently been called the "Great Lakes Bay" region.

The city is geographically divided by the Saginaw River, and travel between the east and west sides of the city is made possible by four modern drawbridges which allow large ships to travel easily down the river. The city is served by MBS International Airport, located in nearby Freeland, and James Clements Municipal Airport.

Leon Tromble is regarded as the first settler within the limits of Bay County, in an area which would become Bay City. In 1831, he built a log cabin on the east bank of the Saginaw river. Bay City was first established in 1837, and was incorporated as a city in 1865. In 1834 John B. Trudell built a log-cabin near the present corner of Seventeenth and Broadway. Trudell later purchased land that extended from his residence north along the river to what later became the location for the Industrial Brownhoist, making him the first permanent resident of what has become Bay County. Bay City became the largest community in the county and the location of the county seat of government. Most of the county's agencies and associations are located here. The city shares common borders with Essexville and the townships of Bangor, Frankenlust, Hampton, Merritt, Monitor, and Portsmouth.

Michigan (ⁱ/ˈmɪʃɨɡən/) is a state located in the Great Lakes region of the Midwestern United States. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake". Michigan is the 8th most populous of the 50 United States, with the 11th most extensive total area. Its capital is Lansing, and the largest city is Detroit. Michigan was admitted into the Union on January 26, 1837 as the 26th state.

Michigan has the longest freshwater coastline of any political subdivision in the world, being bounded by four of the five Great Lakes, plus Lake Saint Clair. Michigan is one of the leading U.S. states for recreational boating. The state has 64,980 inland lakes and ponds. A person in the state is never more than six miles (9.7 km) from a natural water source or more than 85 miles (137 km) from a Great Lakes shoreline. It is the largest state by total area east of the Mississippi River.

Michigan is the only state to consist of two peninsulas. The Lower Peninsula, to which the name Michigan was originally applied, is often noted to be shaped like a mitten. The Upper Peninsula (often referred to as "the U.P.") is separated from the Lower Peninsula by the Straits of Mackinac, a five-mile (8 km) channel that joins Lake Huron to Lake Michigan. The two peninsulas are connected by the Mackinac Bridge. The Upper Peninsula is economically important due to its status as a tourist destination. There is also a variety of natural resources to be found there, including a sizable amount of iron ore.