First, contact your state Division for Children and Families (Maybe the Dept. of Human Services). Each state is different.
There are some specific requirements you have to be able to meet. You must:
1. Be at least 21 years old. 2. Have enough room (and beds) in your home for a foster child to sleep and keep his or her belongings. 3. Have a home that can meet basic fire, safety and sanitary standards. 4. Be physically and emotionally capable of caring for children and have no alcohol or drug abuse problems. 5. Be able to pass a criminal background check and have no substantiated record of abusing or neglecting children. 6. Make enough money to provide for your own family, so you do not need to depend on the foster care reimbursement you receive from the state as income