Saginaw, Midland, and Bay City metropolitan area

Tri-Cities
Combined Statistical Area
Saginaw–Midland–Bay City, MI Combined Statistical Area
From top to bottom: Saginaw, Midland, Bay City
Nickname:  Great Lakes Bay Region
Map of Saginaw–Midland–Bay City, MI CSA   City of Saginaw   Saginaw, MI MSA   City of Midland   Midland, MI MSA   Bay City   Bay City, MI MSA
Coordinates: 42°10′21″N 85°21′09″W / 42.1724°N 85.3524°W / 42.1724; -85.3524
Country	United States
State	Michigan
Largest city	Saginaw
Counties	Saginaw Bay Midland
Principal cities	Saginaw Midland Bay City
Population  (2015)
• Saginaw MSA	200,169
• Tri-Cities CSA	391,569
Time zone	UTC-5 (EST)
• Summer (DST)	UTC-4 (EDT)
Area code	989

The Saginaw–Midland–Bay City Combined Statistical Area is a United States metropolitan area defined by the federal Office of Management and Budget (OMB) surrounding the Saginaw Bay and Saginaw River. The region is a part of the larger area known as Mid/Central Michigan. It includes the smaller statistical areas of Saginaw, Midland, and Bay City.

The Saginaw Metropolitan Statistical Area is a metropolitan area consisting of Saginaw County, anchored by the city of Saginaw and including Saginaw Township. As of the 2010 census, the Metropolitan Statistical Area (MSA) had a population of 200,169.^[1]

The Midland Micropolitan Statistical Area is a Micropolitan Statistical Area anchored by the city of Midland and surrounding Midland County. As of the 2010 census, the Micropolitan Statistical Area (μSA) had a population of 83,629.^[2]

The Bay City Metropolitan Statistical Area is a MSA anchored by the city of Bay City and surrounding Bay County. As of the 2010 census, the Metropolitan Statistical Area had a population of 107,771.^[3]