Can an 18 year old go to a foster home?

I don’t think so, because your considered an adult at 18 so you can’t be controled anymore.

I quote the following from the document accessed via the first link in my earlier response to this question:

“… In Iowa and Wisconsin, as in most states, young people age out of foster care when they are 18 years old. By contrast, Illinois is one of the few states in which young people can and often do remain under the state’s care and supervision until their 21st birthday. Although the average age at exit from foster care for all of the Midwest Study participants who were interviewed at wave 4 was 19.5 years old, study participants from Illinois were, on average, 20.2 years old when they exited while their counterparts from Iowa and Wisconsin were, on average, 18.2 years old. …”

Note in particular the explicit references to Illinois enabling young people to remain in the States care until age 21, …..

….. and also that the OP’s Profile Page lists Chicago, Illinois as his location.

It was for that very reason that all 3 links I posted related to his state of residence.

Can I ask why foster care is an option?

Group home I believe is a yes. In ohio there is a group home for people ages 18-25. This particular group home has rules. but, helps you finish your education and get a job, teaches you how to manage money and all the stuff an adult has to do..

I would check into seeing if something is available around you. we have Foster/adoption agencies around here that help. look into that.

Is this something that you or someone that you know needs to do?

No to foster care and yes to the group home.

The military provides housing… ; )