Streptococcus infantarius subsp. infantarius, a member of the Streptococcus bovis/Streptococcus equinus complex, is highly prevalent in artisanal dairy fermentations in Africa. Here the complete genome sequence of the dairy-adapted S. infantarius subsp. infantarius CJ18 strain--a strain predominant in traditionally fermented camel milk (suusac) from Kenya--is presented.