I got as early as the 1920 census but I'm trying to find info before then.
Is this your Grannie? Meaning your mom's mom. Or your Grannie's mom? I am trying to understand where you are in your search.
Do you know your Grannie's parent's names?
Do you know if she had any siblings? If so, search them -- usually you can find death cert that list parents.
Did you look at the neighbors next to them? Meaning opening up the Census records and looking at who lived next door to them - and seeing if you see anyone who shares her last name. Usually they are family members -- most of our people back then lived next door or on the same street/area back then -- due to them usually being sharecropping families.
Was she married? If so, did you search her husband (your Granddad) on the Census -- you might be able to find her -- and just had the name misspelled -- or with a different last name or her maiden name.
Push comes to shove -- you will have to order a death certificate - and get the names you need for your search/