The Nueve de Julio Department (in Spanish, Departamento Nueve de Julio) is an administrative subdivision (departamento) of the province of Santa Fe, Argentina. It is located in the northwestern corner of the province, limiting with the Vera Department in the east, and with the San Cristóbal Department in the south. To the north it limits with the province of Chaco, and to the west with the province of Santiago del Estero.

Nueve de Julio Department
Department
Location of Nueve de Julio Department within Santa Fe Province
Coordinates: 29°14′S 61°46′W / 29.233°S 61.767°W / -29.233; -61.767
Country	Argentina
Province	Santa Fe
Head town	Tostado
Area
• Total	16,870 km2 (6,510 sq mi)
Population
• Total	28,273
• Density	1.7/km2 (4.3/sq mi)
Time zone	UTC-3 (ART)

The department is the second largest in the province, but it has only about 28,000 inhabitants. The head town is Tostado (population 14,000). Other cities and towns are Esteban Rams, Gato Colorado, Gregoria Pérez de Denis, Juan de Garay, Logroño, Montefiore, Pozo Borrado, San Bernardo, Santa Margarita, and Villa Minetti.

The name of this department corresponds to the date of the Argentine Declaration of Independence (9 July 1816) and is often spelled with the actual figure 9 (Departamento 9 de Julio).