Hi Teresa,
A few good resources to start your search would be Church records (look for marriages, births etc.) and any census that may have been taken in the area they lived (land tax records). Family records (Bibles, baby books, birth records). Also searching your mothers maiden name may help you find their marriage records. Many times these records will have their parents names and sometimes where they were born...
Is your family from Italy? I haven't found where my Casabonas were from in Italy, but I did find a census that listed them immigrating to the USA in 1894 from Italy.
Good Luck!
Wendy