Publius Mummius Sisenna was a Roman politician who was consul ordinarius in 133 with Marcus Antonius Hiberus as his colleague, and governor of Roman Britain shortly afterwards. Hadrian's Wall may have been finished under his governorship. Ronald Syme considers Sisenna's tribe "Galeria" as clear evidence that his family origins lay in Spain, and counts twenty different individuals from those provinces who shared his gentilicium.