Are Midrashim considered Oral Law?

Midrashim are definitely part of our oral tradition. There are more halachically inclined Midrashim such as the Mechilta, Sifri and Sifra which actually deal with law andare also historically earlier and you have more aggadic- story –like inclined midrashim such as midrash Rabba and Tanchuma which are less involved in law per se. They are all part of our rabbinic tradition though particularly the story –like midrashim which seem easy reading are in many instances much deeper than what meets the eye and are not to be understood literally.