According to theU.S. Census Bureau, the county has a total area of 1,494 square miles (3,870 km2), of which 589 square miles (1,530 km2) is land and 905 square miles (2,340 km2) (61%) is water.[6]
As of the2020 census, the county had a population of 81,359.[16] The population density was 138.1 people per square mile (53.3 people/km2), and there were 37,818 housing units at an average density of 64.2 units per square mile (24.8 units/km2).[17]
The median age was 45.1 years, with 20.6% of residents under the age of 18 and 21.4% aged 65 years or older.[17]
For every 100 females there were 101.4 males, and for every 100 females age 18 and over there were 99.4 males.[17]
57.2% of residents lived in urban areas, while 42.8% lived in rural areas.[18]
There were 34,995 households in the county, of which 24.4% had children under the age of 18 living in them. Of all households, 49.1% were married-couple households, 20.4% were households with a male householder and no spouse or partner present, and 22.9% were households with a female householder and no spouse or partner present. About 31.6% of all households were made up of individuals and 14.2% had someone living alone who was 65 years of age or older.[17]
There were 37,818 housing units, of which 7.5% were vacant. Among occupied housing units, 73.5% were owner-occupied and 26.5% were renter-occupied. The homeowner vacancy rate was 1.2% and the rental vacancy rate was 7.5%.[17]
There were 32,721 households, out of which 31.50% had children under the age of 18 living with them, 57.10% weremarried couples living together, 7.50% had a female householder with no husband present, and 31.70% were non-families. 26.80% of all households were made up of individuals, and 12.10% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.04.
In the county, the age distribution is 25.5% under the age of 18, 7.60% from 18 to 24, 28.20% from 25 to 44, 23% from 45 to 64, and 15.70% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 98.20 males. For every 100 females age 18 and over, there were 96.10 males.
In 2017, there were 780 births, giving a general fertility rate of 60.2 births per 1000 women aged 15–44, the 27th lowest rate out of all 72 Wisconsin counties.[20]
The county executive isBob Ziegelbauer. He is serving his fourth term in that position after being elected in April 2006 and reelected in April 2010, April 2014, and April 2018.[21] The county is served by a 25-membercounty board.
Manitowoc County is fairly competitive in presidential elections; in2016,Donald Trump became the first candidate sinceLyndon B. Johnson from his1964 landslide to win more than 55% of the vote. He expanded his share to over 60% during the2020 election, the first time sinceDwight D. Eisenhower in his1956 landslide that a Republican has hit 60% of the vote in the county. Trump continued this upward trend in 2024, albeit slightly. Statewide, Manitowoc County has voted Republican since the2002 gubernatorial election.
The bright light on the lakeshore to the far left is thePoint Beach Nuclear Plant. Taken at 3:09:47 A.M. CDT on March 28, 2012, from an altitude of 211 nautical miles (391 km) during ISSExpedition 30.
The Netflix documentary seriesMaking a Murderer (2015) explores the arrests and trials in 2007 of Manitowoc County residentsSteven Avery and his nephewBrendan Dassey for the murder of Teresa Halbach, who disappeared in October 2005. The series describes an earlier wrongful conviction of Avery, for which he served 18 years, and his subsequent lawsuit against Manitowoc County. It then focuses on the procedures of the Calumet County Sheriff's Office and the Manitowoc County Sheriff's Department, which investigated the later Halbach case. The Sheriffs officers have come under intense scrutiny for their involvement in the Halbach case due to Steven Avery's $36 million lawsuit and their questionable police and investigative techniques.[25][26]
Falge, Louis (ed.).History of Manitowoc County, Wisconsin. Chicago: Goodspeed Historical Association, 1912.Vol. 1,Vol. 2
Langill, Ellen, Robin E. Butler, Rachel Young, and MaryBeth Matzek.Manitowoc County: A Beacon on the Lakeshore. Milwaukee, Wis.: Milwaukee Pub. Group, 1999.
Rapper, Joseph J.Story of a Century, 1848-1948: Manitowoc County During Wisconsin's First Hundred Years. Manitowoc, Wis.: Manitowoc County Centennial Committee, 1948.