 Following the 1797 subdivision into departments, as required by the Constitution of the Cisalpine Republic (1797–1802), Rovello was added to the Verbano department, but it was transferred the following year to the Olona department; a 1799 census showed 1065 inhabitants.In 1801 the town was transferred anew into District II of Varese and became a part of the Lario department.In 1807 Rovello incorporated the surrounding district as the Comune di Rovellasca, but this was reversed in 1812.