Are you from another country? No they don’t. They have less than 4 million each.
You do the math.
LA 10.17 mil
https://www.google.com/search?client=safari&channel=ipad_bm&ei=z3VCW5LiEIy88APrjIfACw&q=population+la+county+ca&oq=population+la+county+ca&gs_l=mobile-gws-wiz-serp.3..0i30j0i8i30l2.60149.62914..63239...0....191.1357.0j10......0....1.........0i71j0i13j0i7i30j0i8i7i30.Tmhf2YC2XRs
OC 3.17 mil
https://www.google.com/search?client=safari&channel=ipad_bm&source=hp&ei=y3VCW4aMI8Sd0gK7r4SACQ&q=population+orange+county+ca&oq=po&gs_l=mobile-gws-wiz-hp.1.0.41l3j0i131j46i131j0l2j0i131.1852.2101..3041...0....192.307.0j2......0....1.......3.qZoTJjcPx4Q