1891Government
The town was founded in 1891 as a major railway town on the Chicago, Burlington and Quincy Railroad.
1895Disaster
In November 1895, a fire destroyed most of the town.
1975History
The News-Record became a daily on July 14, 1975.
1998Education
On December 5, 1998, Cheryl Trover, a math teacher at Campbell County High School, kidnapped and tied up her children, shot her husband John Trover with a .22-caliber pistol, an...
2000History
== Demographics ==
As of 2000, the median income for a household in the city was $69,581, and for a family was $78,377.
2004Culture
113 sculptures are currently on display through the Avenues of Art program and 289 have been shown since 2004.
2006Culture
The festival has grown significantly since starting in 2006.
2010History
=== 2010 census ===
As of the census of 2010, 29,087 people, 10,975 households, and 7,299 families resided in the city.
2012History
These meetings eventually led the two communities to become sister cities in 2012.
2015History
Since the grand opening in 2015, the complex has hosted many tournaments, including the Razor City Showcase softball tournament and the 2016 Wyoming ASA State softball tournament.
2018Government
Gillette annexed the census-designated place Antelope Valley-Crestview on January 1, 2018.
2019Culture
In 2019, PFLAG held the Pride Drag Show at AVA Community Art Center as part of its pride event.
2020History
The Drive-By Truckers' song "21st Century USA", from their 2020 album The Unraveling, is about a layover the band had in Gillette.
2021History
=== Tourism ===
In 2021, 7,338 people visited the Gillette Convention and Visitors Bureau.
2022Culture
It was suspended in 2022 due to a lack of funding and board members - it was brought back as a one day event starting in 2024 and is now held at Big Lost Meadery in downtown Gil...
2023History
The population was estimated at 33,496, as of July 1, 2023, making it the 3rd most populous city in Wyoming after Cheyenne and Casper.
2024History
This program was dissolved by the Gillette City Council on January 16, 2024.