| Official Name: | Dieciocho de Julio |
| Other Name: | 18 de Julio |
| Settlement Type: | Town |
| Pushpin Map: | Uruguay |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Uruguay |
| Subdivision Type: | Country |
| Subdivision Name: |  Uruguay |
| Subdivision Type1: | Department |
| Subdivision Name1: | Rocha Department |
| Population As Of: | 2011 |
| Population Total: | 977 |
| Blank1 Name: | Climate |
| Blank1 Info: | Cfa |
| Timezone: | UTC -3 |
| Coordinates: | -33.6833°N -53.5556°W |
| Postal Code Type: | Postal code |
| Postal Code: | 27101 |
| Area Code Type: | Dial plan |
| Area Code: | +598 4474 (+4 digits) |
Dieciocho de Julio or 18 de Julio is a small town in the Rocha Department of southeastern Uruguay.
The town is located about west of Chuy along Route 19. The next village to its west is San Luis al Medio.
On 12 June 1909, the populated centre known as "San Miguel" was renamed and declared a "Pueblo" (village) by the Act of Ley N° 3.495. Its status was elevated to "Villa" (town) on 20 June 1961 by the Act of Ley Nº 12.876.[1]
In 2011 18 de Julio had a population of 977.[2]
| Year | Population | |
|---|---|---|
| 1963 | 749 | |
| 1975 | 743 | |
| 1985 | 872 | |
| 1996 | 1,139 | |
| 2004 | 1,191 | |
| 2011 | 977 |
In the town, there is the Fortin de San Miguel, a castle which has been converted to an inn and hotel.
At the east end of the town is a hill on which the Fuerte San Miguel is situated, a prominent fort during colonial times, built in 1737 by the Portuguese. Between the fort and the town is also the Criollo Museum, which displays outdoors replicas of the life of the gauchos, as well as indoors exhibits of the carts and carriages of the times.