Located in the south of Cateau-Cambrésis and on the doorstep of Avesnois, Saint-Souplet is surrounded by the nature landscapes of Hainaut : grasslands bordered by 'bocage' hedges and vast expanses of cultivated fields. It extends along the Selle, a tributary river of the Scheldt, which arises in Aisne and winds some 50 kilomètres through Département du Nord.
The name Escaufourt comes from fours à chaux (chalk oven). in the 12th century, Escaufourt was in the parish of Honnechy. Before the merger with Saint-Souplet un 1973, Escaufourt was an enclave of Aisne within Nord.