| Allen | |
| Native Name Lang: | es |
| Settlement Type: | City |
| Pushpin Map: | Argentina |
| Pushpin Map Caption: | Location of Allen in Argentina |
| Coordinates: | -38.9667°N -117°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Argentina |
| Subdivision Type1: | Province |
| Subdivision Type2: | Department |
| Subdivision Name2: | General Roca |
| Leader Party: | Concertación para el Desarrollo |
| Leader Name: | Graciano Bracalente |
| Unit Pref: | Metric |
| Elevation M: | 256 |
| Population Total: | 22,859 |
| Population As Of: | 2010 census |
| Population Density Km2: | auto |
| Blank1 Name: | Climate |
| Timezone1: | ART |
| Utc Offset1: | -3 |
| Postal Code Type: | CPA base |
| Postal Code: | R8328 |
| Area Code Type: | Dialing code |
| Area Code: | +54 2941 |
| Website: | <http://www.allen.gov.ar> |
Allen is a city in the province of Río Negro, Argentina. It has 26,083 inhabitants as per the . It is located on the left-hand (northern) side of the Alto Valle of the Río Negro, near its beginning in the confluence of the Neuquén and Limay rivers, about 200NaN0 west of General Roca and 350NaN0 east of Neuquén.
Allen was founded on 25 May 1910 by Patricio Piñeiro Sorondo. Its name was an homage to British engineer Charles Allen, a local landowner and member of the Gran Ferrocarril Sur railway company, who managed the construction of the city's train station.
The city is divided in half by a canal born in the Ingeniero Ballester Dam that brings water for irrigation from the Neuquén River. Its main traditional economic activity, which continues to be the most important, is the fruit industry. Allen is the National Capital of the Pear, hosting an annual National Festival of the Pear, and the seat of the Río Negro Fruit Market.