Cajeme
Cajeme is one of the municipalities  of the northwestern state of Sonora, Mexico.  It is named after Cajemé, a Yaqui leader. The municipality has an area of 3,312.05 km² (1,278.79 sq mi) and with a population of 433,050 inhabitants as of 2015.

History
Yaqui tribes settled in the region at approximately 1100 and in 1533 had the first contact with the Spanish conquistadors, when Diego de Guzmán arrived at the Yaqui region. The Yaquis defeated the Spanish army. In the 17th century Jesuit missionaries visited the zone to evangelize the Yaqui natives in 1617. In 1619, one of the missionaries, Martín Burgencio founded the villa of Buenavista and later the villa of Cumuripa. In 1715 El Realito was founded, which is located in the northern region of the current municipio). In the 19th century agriculture developed at the villas of Cumuripa, Buenavista and Cócorit.

Buenavista was the site for the military base of San Carlos de Buenavista during the Spanish colony. It was considered the capital of the Villa de Salvación since 1820 and in the second half of the 19th century it was considered part of the Guaymas district, as well as part of the Yaqui pueblos.

The first inhabitants of Ciudad Obregón established at the Plano Oriente neighborhood when irrigation systems by the Richardson company started functioning in 1910. The train Sudpacífico established a station they called Cajeme. Cajeme then was a part of the municipio of Cócorit until it became the capital of the municipio on November 29, 1927. On July 28, 1928, Ciudad Obregón was declared as name for the town previously known as Cajeme and that it would become the capital of the municipio of Cajeme. Previously Cócorit had been dependent on the district of Buenavista during the independent period. According to a law from 1828 for the indigenous governments it was established as a capital of one of their government divisions. On December 26, 1930 it was annexed to the Cajeme municipality.

Important towns
Ciudad Obregón 
Cócorit
Esperanza
Marte R. Gómez (Tobarito)
Providencia
Pueblo Yaqui

Government 
The current  municipal president is Sergio Pablo Mariscal Alvarado (MORENA) elected to govern from 2018 until 2021.

Previous municipal presidents are:
  2015-2018 Faustino Felix Chavez (PRI)
  2012-2015 Rogelio Diaz Brown (PRI)
  2009-2012 Manuel Barro Borgaro (PAN) 
  2006-2009 Francisco Villanueva Salazar (PRI) 
  2003-2006 Armando Jesús Félix Holguín (PAN)
 2000-2003 C.P. Ricardo Robinson Bours Castelo (PRI)
  1997-2000 Lic. Carlos J. Lamarque Cano (PRD)
 1994-1997
  1994-1997 Lic. Raúl Ayala Candelas (PRI)
  1994-1994 Sr. Sergio Gastélum de la Vega (PRI)
  1991-1994 Sr. Faustino Félix Escalante (PRI)
  1988-1991 Sr. Jesús Armando Félix Holguín (PRI)
  1985-1988 Lic. Sóstenes Valenzuela Miller (PRI)
  1982-1985 Ing. Eduardo Estrella Acedo (PRI)
  1979-1982 Ing.. Adalberto Rosas López (PAN)
  1976-1979 Dr. Oscar Russo Vogel (PRI)
  1973-1976 Sr. Rodolfo León Manzo (PRI)
1970-1973
  1972-1973 Dr. Alonso Hernando Pola (PRI)
  1970-1972 Dr. Carlos López Arias (PRI)
  1970-1970 Sr. Rubén H. Meza (PRI)
  1970-1970 Sr. Luis Antillón Peñuñuri (PRI)
  1970-1970 Sr. José Romano Félix (PRI)
  1967-1970 Sr. Javier Robinson Bours (PRI)
  1964-1967 Sr. Ángel López Gutiérrez (PRI)
  1961-1964 Sr. Faustino Félix Serna (PRI)
1958-1961
  1958-1961 Sr. J. Encarnación Chávez (PRI)
  1958-1958 Sr. Antonio Valdés C (PRI)
  1955-1958 Sr. René Gándara (PRI)
1952-1951
  1954-1955 Sr. Faustino Félix Serna (PRI)
  1952-1954 Sr. Rodolfo Elías Calles (PRI)
  1949-1952 Sr. Miguel Guerrero V (PRI)
  1946-1949 Sr. Vicente Padilla Hernández (PRI)
  1943-1946 Profr. Heriberto Salazar S (PRI)
 1940-1943
  1941-1943 Sr. Abelardo B Sobrazo (PRI)
 1940-1941 Sr. Faustino Félix Gastelum (PRI)
 1940-1940 Sr. Ignacio E. García (PRI)
 1937-1940
  1939-1940 Sr. Ramón M. Real (PRI)
  1938-1939 Sr. Manuel M. Aguirre (PRI)
 1938-1939 Sr. Rafael A. Girado (PRI)
 1938-1938 Sr. Félix Verduzco (PRI)
  1937-1938 Sr. Wistano García (PRI)
 1937-1937 Gral Francisco Urbalejo (PRI)
 1937-1937 Mayor Felipe Ruiz (PRI)
  1935-1937 Sr. Matías Méndez Limón (PRI)
 1932-1935
  1935-1935 Sr. Antonio Salomón (PRI)
  1933-1935 Sr. Manuel M. Escamilla (PRI)
  1932-1932 Sr. Vicente Mexía L (PRI)
1929-1932
  1931-1932 Sr. Viviano Martínez (PRI)
  1930-1931 Sr. Flavio F. Bórquez (PRI)
  1929-1930 Sr. Gustavo Dolores Cuevas (PRI)
  1928-1929 Sr. Ignacio Moncada H
  1927-1928 Sr. Ignacio Ruiz