Armstrong is a city in the southwest of the province of Santa Fe, Argentina. It has 11,181 inhabitants as per the 2010 census [INDEC]. It is located 214 km (133 mi) from the provincial capital Santa Fe, 80 km (50 mi) west of Rosario and 20 km (12 mi) from Cañada de Gómez, on National Route 9 near the intersection with National Route 178.