Though growth in the hamlets of Whitchurch–Stouffville was stagnant after the demise of the forest industry, the population began to grow again in the 1970s, with development in Metropolitan Toronto and the consequent arrival of new commuters. These developments led to a reexamination at the provincial level of municipal governance. On January 1, 1971, Whitchurch Township and the Village of Stouffville were merged to create the Town of Whitchurch–Stouffville; the combined population was 11,487. The town's southern boundary was also moved four farm lots south of the original southern boundary of Main Street. This land was formerly a part of Markham Township.