Here is the structure of the state party, as of Aug 2016.The 15 county Republican chairmen
One member for each three elected Republican PCs
The Chairman, Secretary and Treasurer elected at the biannual Statutory Meeting and other officers elected at the biannual Mandatory Meeting (except National Committeeman and Committeewoman, who are elected at quadrennial State Convention).
County committees include all PCs within that county. They meet in January after general elections to elect a chairman, two vice chairs, a secretary and a treasurer.
Legislative district committees exist in counties of more than 500,000 people (Maricopa and Pima Counties), and include all PCs within that district. Officers are elected at Organizational Meetings after the general election including a chairman, two vice chairs, a secretary and a treasurer.
Precinct committeemen are elected one per precinct, plus one additional for each 125 registered voters of that party as of March 1 of the general election year. There are over 1,666 precincts statewide (including over 724 precincts in Maricopa County.)
These are the Republican Party members who hold federal offices.
The Arizona Republican Party holds both seats in Arizona's delegation to the United States Senate.John McCain
The Arizona Republican Party is the majority party in Arizona's delegation to the United States House of Representatives, holding five of the nine seats.2 Martha McSally (R)
4 Paul Gosar (R)
5 Andy Biggs (R)
6 David Schweikert (R)
8 Trent Franks (R)
The Arizona Republican Party is the majority party in the State Executive, holding 10 of 15 seats. The other 5 seats are held by nonpartisan politicians.
The Arizona Republican Party holds a majority in the Arizona State Senate, holding 17 of the 30 seats.
The Arizona Republican Party holds the majority in the State House of Representative, holding 36 of the 60 seats.Gail Barney (Queen Creek)
Bob Barrett (Peoria)
Kenny Evans (Payson)
Ed Honea (Marana)
John Insalaco (Apache Junction)
John Lewis (Gilbert)
Scott LeMarr (Paradise Valley)
Michael LeVault (Youngtown)
Georgia Lord (Goodyear)
Mark Nexsen (Lake Havasu City)
Lana Mook (El Mirage)
Christian Price (Maricopa)
Thomas Schoaf (Litchfield Park)
Thomas Shope (Coolidge)
Scott Smith (Mesa)
Jay Tibshraeny (Chandler)