William Wellington Wellwood Grant OD (1894 – 27 August 1977) was a Jamaican labour activist. He was known as "St. William Grant", "St." presumably meaning "Sergeant" in reference to his military or UNIA service. He is regarded as the person who started the struggle of the working class in Jamaica. Understanding that as an uneducated black man he would never win the respect of the Colonial Government, he entrusted Alexander Bustamante with the responsibility of taking the struggles of the working class to the next level.