1832Military
In 1832, the Menominee surrendered the land between the Milwaukee River and Lake Michigan to the United States Federal Government through the Treaty of Washington.
1833Military
The Potawatomi surrendered the area of Mequon west of the Milwaukee River in 1833 through the 1833 Treaty of Chicago, which (after being ratified in 1835) required them to leave...
1837Government
One of the first settlers was John Weston, who settled near present-day Thiensville in 1837 and served as the first postmaster of the Town of Mequon.
1839Government
Some of the first German settlers were Old Lutherans who founded the Freistadt community—now a neighborhood in western Mequon—in 1839 and went on to form the first Lutheran cong...
1840Architecture
In 1840, they built a log cabin church, which they named Trinity Lutheran Church.
1842History
=== Thiensville ===
Joachim Heinrich Thien moved to the area in 1842 from Oldenburg, Prussia, and helped design a plan for the settlement that would become Thiensville.
1845History
In 1845, what would become the Lutheran Synod of Buffalo was organized in Freistadt.
1846Disaster
Thien hosted the first town meeting for the Town of Mequon in 1846, and in 1857 he established the volunteer fire department and served as its first captain.
1848Culture
However, the Freistadt church became a part of the Lutheran Church–Missouri Synod in 1848.
1884Architecture
The wooden church was replaced with a limestone building in 1884.
1907Military
The train was in operation from 1907 to 1948, when it fell into disuse following World War II.
1910Government
Thiensville incorporated as a village in 1910.
1919History
The influence of the freethinker societies kept formal churches out of the village until 1919, when St.
1928History
In 1928, 6,600 of the 8,841 pelts sold by the New York Auction Co.
1929Economy
In 1929, the Nieman and Fromm operations broke their own record with auction sales of $1,331,679, making them a leader in the national fur industry.
1933Disaster
=== Mequon Fire Department ===
Mequon's fire department was founded in 1933.
1935History
The highest temperature ever recorded in Mequon was 105 °F (41 °C) on July 24, 1935, and again on July 17, 1995.
1937History
By 1937, the farms were selling 30,000 pelts per year.
1945Crime
In 1945, eighty German prisoners of war from Camp Fredonia in Little Kohler, Wisconsin were contracted to work at the Herbert A.
1950History
Between 1950 and 1960, the population increased by roughly 110%, from 4,065 to 8,543.
1954Government
With growth came the risk that municipalities such as Thiensville or Milwaukee would try to annex land from the Town of Mequon, as happened to the Milwaukee County's Town of Lak...
1957Government
The community incorporated as a city in 1957 to avoid annexation by the City of Milwaukee.
1958Government
=== Mequon Police Department ===
The Mequon Police Department was established in 1958 and is located in the City of Mequon Safety Building, which also serves as one of the city'...
1982History
The coldest temperature ever recorded in the city was −40 °F (−40 °C), on January 17, 1982, also known as Cold Sunday.
1983Education
In 1983, Concordia University Wisconsin moved from its campus in Milwaukee to a newly acquired campus in Mequon.
1984Education
The two parishes merged in 1984 to form Lumen Christi Catholic Church, although the church maintained two campuses until September 2016, when a new, larger church and school fac...
1985History
Fur sales declined later in the 20th century, and the Mequon farms sold their last pelts in 1985.
1994Architecture
When it opened in 1994, it was the only hospital in Ozaukee County.
1999Culture
Police Chief Patrick Pryor has served with the department since 1999.
2000History
=== 2000 census ===
As of the census of 2000, there were 21,823 people, 7,861 households, and 6,406 families residing in the city.
2002Education
=== Performing arts ===
Acacia Theatre Company: The nondenominational Christian theater company has been based out of the Todd Wehr Auditorium at Concordia University Wisconsin ...
2005History
As of 2005, Mequon was the third-largest city in terms of land area in the state of Wisconsin.
2006Disaster
Fire Chief David Bialk has served with the department since 2006 and oversees a staff of approximately sixty firefighters, EMTs and paramedics.
2007History
The median income for a household in the city was $90,733, and the median income for a family was $101,793 (These figures had risen to $97,797 and $113,265, respectively, as of ...
2009History
Census Bureau estimated the median income for a household in the city in 2009–2011 to be $106,647, and the median income for a family to be $124,422.
2010History
== Demographics ==
=== 2010 census ===
As of the census of 2010, there were 23,132 people, 8,598 households, and 6,561 families residing in the city.
2015History
As of 2015, the two institutions—both located in close proximity to Interstate 43—were among the largest employers in Ozaukee County.
2017History
Matthew Joynt, the current superintendent, has held the position since 2017.
2018Culture
In 2018, the library made 307,796 loans to patrons.
2019Architecture
The museum opened to the public in 2019, and admission is free.
2020Education
As of 2020, four churches—Christ Alone Evangelical; Christ Alone Evangelical, North Campus; St.
2022Government
The current mayor is Andrew Nerbun, who was elected to his first three-year term on April 5, 2022.