Bay County is a county in the state of Michigan. Based on the 2010 census, the population was 107,771. The county seat is Bay City.
Bay County comprises the Bay City, MI Metropolitan Statistical Area, which is included in the Saginaw-Midland-Bay City, MI Combined
Statistical Area. It is also considered to be part of the Flint/Tri-Cities region.
Bay County lies at the head of Saginaw Bay.
County QuickFacts: CensusBureau Quick Facts
Bay County lies at the head of Saginaw Bay.
Set Off: 1857
The county was created by Michigan law as a fully organized county on April 20, 1857.
Bay County was created in 1857 from portions of Midland County, Saginaw County, and Arenac County. Its name origin is that it "surrounds
Saginaw Bay." Being only sparsely populated at that time, Arenac County government was unorganized and was attached to Saginaw County for
administrative purposes. There was considerable opposition to the creation of Bay County from elected officials in both Saginaw and Midland
counties. In 1854, a bill introduced to the state legislature to create Bay County was defeated by a small majority.
In 1857, a new bill was introduced into the legislature. After initial opposition from the representatives of Saginaw and Midland counties, a
compromise revision that would present the matter for ratification to the voters of "in said county" was passed by the legislature on February
17, 1857. The matter was put before all the voters of Saginaw and Midland counties and was soundly defeated. However, the population within
the boundaries proposed for Bay County approved the measure. The bill passed by the legislature included phrasing, which was deliberately
included by the Bay City lawyer Chester H. Freeman, that allowed Bay County to claim ratification. Under the act, the county was to become
effective April 20, 1857.
Residents of Bay County held elections for county officials in June 1857. However, Saginaw County did not recognize the organization of the
new county government. In the winter of 1858, Freeman secured passage of a bill in the legislature that would have confirmed the organization
of Bay County. But the bill was vetoed by the governor. However, a case that went before the Michigan Supreme Court in its May 1858 term
settled the matter. In the case, a defendant was tried in a Saginaw County court, but filed a plea for abatement, claiming that the supposed
offense was committed in Bay County and was not in the jurisdiction of the Saginaw County court. Freeman had represented the defendant and
prepared arguments, but became incapacitated due to illness. At the request of Freeman's wife, Colonel William M. Fenton argued the case
before the Michigan Supreme Court, with the result that Bay County was declared a fully organized county.
As reported by the Census Bureau, the county has a total area of 631 square miles (1,630 km2), of which 442 square miles (1,140 km2) is
land and 188 square miles (490 km2) (30%) is water. It is the fifth-smallest county in Michigan by land area.
The Saginaw River flows through Bay City while the Kawkawlin River drains much of the central portion of the county. The Pinconning River and
Saganing Creek drain the northern portion. The Saginaw Bay of Lake Huron lies to the east, giving the county its name.
Bordering counties are as follows: