| Unit Name: | 37th Division |
| Native Name: | 37.ª División |
| Start Date: | May 1937 |
| End Date: | March 1939 |
| Allegiance: | Republican faction |
| Branch: | Spanish Republican Army |
| Type: | Infantry |
| Specialization: | --> |
| Size: | Division |
| Colours: | --> |
| Colours Label: | --> |
| Battles: | Spanish Civil War |
| Notable Commanders: | José Ruiz Farrona José Sabín Pérez |
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.
The unit was created in May 1937, in the Front of Extremadura. The division, which was made up of the mixed brigades 20th, 63rd, 91st and 109th, was assigned to VII Army Corps. It had its headquarters in Castuera. 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, suffering heavy losses, although some troops managed to escape the siege. For its part, the 109th Mixed Brigade was completely destroyed, although it was rebuilt later. The division was subjected to a reorganization, with the militia major José Sabín Pérez taking command.
It did not take part in major military operations again.
| Date | Attached Army Corps | Integrated mixed brigades | Battlefront | |
|---|---|---|---|---|
| June 1937 | Estremadura | |||
| March-April 1938 | VII Army Corps | Estremadura | ||
| July 1938 | VII Army Corps | Estremadura | ||
| July 20, 1938 | VII Army Corps | Estremadura | ||
| August 15, 1938 | VII Army Corps | Estremadura | ||
| October 23, 1938 | VII Army Corps | 4th, 20th and 109th | Estremadura |