TriCo Bancshares (TCBK) 8-K Trico Bancshares Announces Quarterly Cash Dividend

Exhibit 99.1

TRICO BANCSHARES ANNOUNCES QUARTERLY CASH DIVIDEND

PRESS RELEASE	Contact: Peter G. Wiese
FOR IMMEDIATE RELEASE	Executive Vice President & CFO
	(530)898-0300

CHICO, Calif. – (September 4, 2018) – The Board of Directors of TriCo Bancshares (NASDAQ: TCBK), parent company of Tri Counties Bank, declared a quarterly cash dividend of $0.17 (seventeen cents) per share on August 31, 2018. The dividend is payable on September 28, 2018 to holders of record as of September 14, 2018.

Established in 1975, Tri Counties Bank is a wholly-owned subsidiary of TriCo Bancshares (NASDAQ: TCBK) headquartered in Chico, California, providing a unique brand of customerService with Solutions available in traditional stand-alone andin-store bank branches in communities throughout Northern and Central California. Tri Counties Bank provides an extensive and competitive breadth of consumer, small business and commercial banking financial services, along with convenientaround-the-clock ATM, online and mobile banking access. Brokerage services are provided by the Bank’s investment services through affiliation with Raymond James Financial Services, Inc.Visitwww.TriCountiesBank.com to learn more.