Devon John Mathis (born September 21, 1982) is an American politician serving as a member of the California State Assembly from the newly drawn 33rd District, which is located in Kings County, western Tulare County, and a small part of southern Fresno County. He serves as the Caucus Operations Chair for the California State Assembly Republican Caucus.
 Mathis was born in Porterville, California. He earned an Associate of Arts degree in Social Sciences from Porterville College and Bachelor of Arts in Public Administration from California State University, Fresno.[citation needed] Mathis graduated from George Washington University earning a Master of Professional Studies in Strategic Public Relations in 2021.
 Before joining the Assembly, Mathis served for 10 years as a Sergeant in the Army National Guard, including two tours in Iraq. During his second tour in Iraq, Mathis was severely injured in a roadside bomb attack, for which he was awarded a Purple Heart.
 In 2014, he unexpectedly defeated Woodlake Mayor Rudy Mendoza, a fellow Republican who was better known[citation needed] and had more support from established Republicans.[citation needed] Mendoza sought a rematch in 2016, but Mathis defeated him again in the primary. Mathis, who had no previous political experience, ran on his status as a former Army National Guard sergeant and veterans advocate.
 In July 2017 Mathis, along with four other Republican assemblymen, voted "Yes" on AB 398 to extend California's Cap and Trade program.
 In 2018, Mathis faced a serious primary challenge, winning only 30% of the vote and narrowly eliminating Republican Visalia Mayor Warren Gubler. But in the November general election, he rallied and defeated Democratic Tulare City Councilman Jose Sigala with 58% of the vote.[citation needed]
 Mathis was not seriously challenged in 2020 or in 2022.
 He currently serves as the Vice Chair of the Assembly Committee on Agriculture  and the Vice Chair of the Assembly Committee on Water, Parks, and Wildlife. Mathis also serves on the Assembly Committee on Appropriations, the Committee on Government Organization, the Committee on Military and Veteran Affairs, the Committee on Natural Resources, and the Utilities and Energy Committee.
 To date, Mathis has successfully authored 17 bills and 15 resolutions that have been chaptered into state law; he is also listed as a joint author to 46 other measures and 9 other resolutions. Spanning his legislative career, Mathis has coauthored 139 bills and 954 resolutions that have been chaptered into law.
 On November 27, 2023, Mathis announced that he would not be a candidate for reelection.
 Devon lives in Porterville with his five children. He married Mistie Davis on October 6, 2023.
 In October 2017 it was announced by the Sacramento Police Department that Mathis was being investigated for an alleged sexual assault against a female member of his staff. A conservative political blog, American Children First, reported that sources had informed them that Mathis and several staff members had gone out drinking and returned to the home of one of the staff members. There, it was alleged and later disproven, an inebriated female staff member had gone into a bedroom and passed out on the bed, and Mathis was alleged to have "digitally penetrated" her while she was unconscious.
 Regarding the incident, Mathis' office released this statement: “We have a policy of not responding to unsubstantiated, random social media posts.” A spokesman for the Sacramento Police Department. said that “information of a possible sexual assault was brought to our attention. We are starting to follow up with the information we have." Following an investigation, none of the accusations were substantiated clearing Mathis of any wrongdoing regarding this event.
 California Assembly officials required Mathis to take remedial sexual harassment training after a claim that he engaged in the utterance of coarse language (locker-room talk) and made sexual remarks about fellow lawmakers.