|Secretary of State of Arizona|
|Term length||Four years, can succeed self once; eligible again after 4-year respite|
The Secretary of State of Arizona is an elected position in the U.S. state of Arizona. Since Arizona does not have a lieutenant governor, the Secretary stands first in the line of succession to the governorship. The Secretary also serves as acting governor whenever the governor is incapacitated or out of state. The Secretary is the keeper of the Seal of Arizona, and administers oaths of office.  The current secretary is Michele Reagan.
The longest served Secretary is Wesley Bolin, who served 12 full terms (including the last biennial one and the first quadrennial one), and 1 partial term for a total of 28 years, 9 months, 18 days (or 10,518 days). Bolin was also the shortest serving governor, ascending to the Governorship in 1977 after Raúl Héctor Castro resigned, and serving only 5 months before his death.
The second longest serving is James H. Kerby who was elected to 6 biennial terms in 1923–1929, and again in 1933–1939. He is also the only one to serve non-consecutively in the office. The shortest tenure goes to John C. Callaghan who died 20 days after his inauguration.
Sidney P. Osborn is the only Secretary to be elected Governor without having first ascended to the office upon the death, resignation, or impeachment of a sitting Governor. He was also the first Governor to die in office, making Dan Garvey the first Secretary to ascend to the position.
The Secretary is in charge of a wide variety of other duties as well. The Secretary is in charge of four divisions:
- The Secretary is in charge of the Arizona Advance Directive Registry, which is the official state repository of advance directives such as living wills, Medical Powers of Attorney, and Mental Health Powers of Attorney.
- The Business Services Division is responsible for registering trademarks, trade names, and liens under the Uniform Commercial Code. This division also issues apostilles, files intergovernmental agreements and notices of public meetings, and regulates notaries public, employment agencies, sports agents, out-of-state landlords, telemarketers, and charitable organizations. The Business Services Division is responsible for chartering partnerships; corporations, on the other hand, are the responsibility of the Arizona Corporation Commission. 
- The Elections Division is responsible for administering all elections in the state, and certifying their results. This division also regulates lobbying and campaign finance.
- The Public Services Division is responsible for filing bills from the Arizona Legislature, registering and publishing administrative regulations, and publishes the Arizona Blue Book, which is an informational guide to the government of Arizona. 
The Secretary administers the Arizona State Library, Archives and Public Records.
|# [c]||Secretary||Term start||Term end||Party||Terms [d]|
|1||Sidney Preston Osborn||February 14, 1912||January 6, 1919||Democratic||3|
|2||Mit Simms||January 7, 1919||January 3, 1921||Democratic||1|
|3||Ernest R. Hall||January 3, 1921||January 1, 1923||Republican||1|
|4||James H. Kerby||January 1, 1923||January 7, 1929||Democratic||3|
|5||John C. Callaghan||January 7, 1929||January 27, 1929||Democratic||1⁄2 [e]|
|6||Isaac "Ike" Peter Fraizer||January 27, 1929||January 5, 1931||Republican||1⁄2 [f]|
|7||Scott White||January 5, 1931||January 2, 1933||Democratic||1|
|4||James H. Kerby||January 2, 1933||January 2, 1939||Democratic||3|
|8||Harry M. Moore||January 2, 1939||November 20, 1942||Democratic||1 1⁄2 [g]|
|9||Dan Edward Garvey||November 27, 1942||May 25, 1948||Democratic||3 1⁄2 [h]|
|10||Curtis M. Williams||November 22, 1948||January 3, 1949||Democratic||1⁄2 [f]|
|11||Wesley Bolin||January 3, 1949||October 20, 1977||Democratic||12 1⁄2 [i]|
|12||Rose Mofford||October 20, 1977||April 5, 1988||Democratic||3 1⁄2 [h]|
|13||James Shumway||April 5, 1988||March 6, 1991||Democratic||1⁄2 [f]|
|14||Richard D. Mahoney||March 6, 1991||January 3, 1995||Democratic||1 [j]|
|15||Jane Dee Hull||January 3, 1995||November 5, 1997||Republican||1⁄2 [k]|
|16||Betsey Bayless||November 5, 1997||January 6, 2003||Republican||1 1⁄2 [f]|
|17||Jan Brewer||January 6, 2003||January 21, 2009||Republican||1 1⁄2 [k]|
|18||Ken Bennett||January 21, 2009||January 5, 2015||Republican||1 1⁄2 [f]|
|19||Michele Reagan||January 5, 2015||Incumbent||Republican||1 [l]|
As of January 2017 [update], five former secretaries of state were alive. The oldest living secretary of state is Jane Dee Hull (1995–1997, born 1935). The most recent death of a former secretary of state was that of Rose Mofford (1922–2016), on September 15, 2016.
|Secretary of State||Term||Date of birth (and age)|
|Richard D. Mahoney||1991–1995||May 28, 1951|
|Jane Dee Hull||1995–1997||August 8, 1935|
|Betsey Bayless||1997–2003||January 10, 1944|
|Jan Brewer||2003–2009||September 26, 1944|
|Ken Bennett||2009–2015||August 1, 1959|
- Includes one term served by a repeat secretary and some terms served by an appointed secretary.
- Includes some terms served by an appointed secretary.
- Repeat Secretaries are officially numbered only once; subsequent terms are marked with their original number italicized.
- The fractional terms of some Secretaries are not to be understood absolutely literally; rather, they are meant to show single terms during which multiple Secretaries served, due to resignations, deaths and the like.
- Died in office.
- Appointed to the Secretaryship.
- Died in office during his second term, but after being elected to a third term.
- Appointed to the Secretaryship. Ascended to the Governorship.
- Term lengths were changed in 1968 for executive offices from 2 to 4 years. Ascended to Governorship.
- Term beginnings and endings changed from March to January at this time.
- Ascended to the Governorship.
- Secretary Reagan's term expires on January 7, 2019.