1857Government
Gardner was founded as a Free-Stater settlement in 1857.
1858Government
The first post office in Gardner was established in 1858.
2000History
=== 2000 census ===
As of the census of 2000, there were 9,396 people, 3,307 households, and 2,460 families living in the city.
2010History
=== 2010 census ===
As of the census of 2010, there were 19,123 people, 6,644 households, and 4,938 families living in the city.
2013Architecture
It opened in May 2013 and employs about 200.
2016History
The 2016-2020 5-year American Community Survey estimates show that the median household income was $78,193 (with a margin of error of +/- $4,899) and the median family income wa...
2020History
== Demographics ==
=== 2020 census ===
The 2020 United States census counted 23,287 people, 8,005 households, and 5,938 families in Gardner.
2024Government
=== Top employers ===
According to the city's 2024 Annual Comprehensive Financial Report, Gardner's top employers are:
== Government ==
The mayor of Gardner is Todd Winters, w...
2025History
As of February of 2025 it employs 38 sworn officers.