Sirola, Širola are the surnames of:
Leander Sirola (1871–1960), Finnish parliamentarian
Yrjö Elias Sirola, né Sirén (1876-1936), a Finnish socialist politician
Hannes Juho Rikhard Sirola (1890-1985), a Finnish gymnast
Orlando Sirola (1928-1995), an Italian tennis player from Italy
Jouko Sirola (s. 1963), Finnish writer