KC Crosbie was elected as the National Committeewoman from Kentucky in June 2012 and RNC Treasurer in January 2023.

In 2007, Lexington citizens elected KC as their representative on the Lexington-Fayette Urban County Government City Council. KC was re-elected and served three, consecutive terms. KC was chosen by her Council colleagues to serve on various, intergovernment committees, including General Government Oversight, Health and Social Services and Public Safety. KC represented Lexington as the City Council's representative on the Metropolitan Planning Organization.

During her tenure as National Committeewoman, KC has served on the RNC Executive Committee, RNC Rules Committee, and RNC Faith Advisory Board. KC represents the RNC on the Convention Selection Committee which recently selected Milwaukee, Wisconsin to host the 2024 GOP Convention, and continues working with other committee members to identify the future location for the 2028 GOP Convention.

In Kentucky, KC was appointed GOP Finance Chair, and served on the Kentucky GOP Executive and Budget Committees. KC has chaired several coalitions for federal and statewide candidates, engaging thousands of grassroots activists from all 120 counties in Kentucky. KC is a charter member of the Women Republicans of Central Kentucky an active member of the Fayette County Republican Womens Club.

Prior to her election as RNC Treasurer, KC worked 18 years for a Fortune 50 company Healthcare/Pharma company where she was involved in procuring and managing multi-million-dollar health care contracts. She later founded Lexington Diagnostic Solutions, LLC, a Kentucky distributor of medical testing supplies and diagnostic products. KC is currently a partner with Andover Farms LLC, a Kentucky small business.

KC is originally from Dayton, Ohio. She earned her B.A. in Communications from the University of Kentucky. KC is also involved in her community as a University of Kentucky Fellow, the Junior League of Lexington, a youth Sunday school teacher, and her church's outreach and recreational ministry among many other things. She also served on the Commonwealth of Kentucky Crime Victims Compensation Board, the Commonwealth of Kentucky Board of Claims, the Commonwealth of Kentucky Judicial Nomination Commission, and the Lexington Children’s Museum Board. KC is married to Scott Crosbie, a Lexington lawyer and they have three adult children, Kirby, Cate, and Mac.