The 37th Division was a military formation belonging to the Spanish Republican Army that fought during the Spanish Civil War. It was deployed on the Extremadura front during the entire war.

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37th Division
37.ª División
Active	May 1937–March 1939
Country	Spain
Allegiance	Republican faction
Branch	Spanish Republican Army
Type	Infantry
Size	Division
Engagements	Spanish Civil War: Battle of Merida pocket
Commanders
Notable commanders	José Ruiz Farrona José Sabín Pérez

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The unit was created in May 1937,^[1] in the Front of Extremadura. The division, which was made up of the mixed brigades 20th, 63rd, 91st and 109th,^[1] was assigned to VII Army Corps.^[2] It had its headquarters in Castuera.^[3] During the following months, it remained in its positions, without intervening in relevant operations.

In July 1938, it took part in the Battle of Merida pocket, during which he suffered considerable damage. Its 20th and 91st brigades were isolated inside the pocket,^[4] suffering heavy losses, although some troops managed to escape the siege. For its part, the 109th Mixed Brigade was completely destroyed,^[5] although it was rebuilt later. The division was subjected to a reorganization, with the militia major José Sabín Pérez taking command.^{[6] [7]}

It did not take part in major military operations again.

Commanders

• Lieutenant Colonel Juan Arce Mayora^[8]
• Lieutenant Colonel José Ruiz Farrona^[9]
• Infantry captain Justo López Mejías^[10]
• Infantry commander Alejandro Sánchez Cabezudo^[11]
• Infantry commander Antonio Cano Chacón^[6]
• Militia major José Sabín Pérez;^[7]
• Militia major Donato Sánchez Lueño;^[6]
• Militia major Olegario Pachón Núñez;

Commissars

• Benigno Cardeñoso Negrete, of the PSOE;^[12]
• Miguel Carnicero, from the PSOE;^[13]
• Germán Clemente de la Cruz, from the CNT;

Chiefs of Staff

• Commander Donato Sánchez Muñoz;
• Captain Pedro Tirado Navarro;
• Commander Manuel Luque Molinello;