St Elmo census will not be found will be found under the county but under areas like Grand Bay Irvington, Heron Bay, the Island places like that on the census. Due to it was small and out in the county. There has been many time I have found family in areas of Mobile County Census I never knew I would find them. Look at areas around that area because you never know what may have happened around that time, that may have caused them to move. Work, some one get sick, schools and family, and of this can cause a family to move for a period of time. And some time I have found out for myself the person you are looking up is not the person give the information or put it down on the census all the time. I wish you the best of luck.