11 Ọgọọst bu ubochi nke 11th (nke iri na out) na onwa ana kpo Ọgọọst. Na Gregorian calender, 11 Ọgọọst bu ubochi nke 223rd (224th na afo nke ana-kpo leap year) na afo. Anyi nwere agugu ubochi 142 du mgbe afo na agwu.