Applied to Cal Poly Pomona, but I don’t know anyone who goes there. Also how good is SSU (Sonoma) ?
Cal Poly Pomona is an excellent school especially for STEM/Architecture and Animal Science. Their Business school is also considered very good. What is your intended major?
I am trying for a Political Science major, however I am also interested in Business Administration.
Sonoma State would be a good option for a business major.
Apply to both 
While their environment is different (and I’d give a nod to Sonoma for Poli Sci), both are similarly good. Make the decision in the Spring, if both admit you!
Sac State’s proximity to the state capitol make it a good candidate for Poly Sci. They have a strong business program too.
Knowing your qualifications would help me make a more precise recommendation.