Zions Bancorporation Board Increases Dividend To $0.43 Per Share

Las Vegas
May 4, 2007

Nevada State Bank’s parent company, Zions Bancorporation (NASDAQ: ZION) announced today that its board of directors declared a regular quarterly dividend of $0.43 per common share, an increase of $0.04 or 10% over the rate in effect in recent quarters. The dividend is payable May 23, 2007 to shareholders of record on May 9, 2007.

Nevada State Bank, with assets over $4.0 billion, is the fourth largest commercial bank in Nevada. Established in 1959, it is the oldest state-chartered bank in Nevada with a total of 73 branches statewide. Many of these branches are conveniently located in Smith’s Food & Drug Stores, open on evenings and weekends. Nevada State Bank is a full-service bank offering a complete range of consumer and business services. For more information on Nevada State Bank, call 702.383.0009 or access www.nsbank.com.