Sigma, Capiz

', officially the ' (Capiznon/Hiligaynon: "Banwa sang Sigma"; ), is a in the province of , . According to the , it has a population of people.
Sigma is from Roxas City, the provincial capital.
It was named after the legendary Datu Sikma, which was corrupted by the Spaniards into Sigma, as they have difficulty in pronouncing the letter "k".
Barangays.
Sigma is politically subdivided into 21 barangays.
Demographics.
In the , the population of Sigma, Capiz, was people, with a density of .