The comedian told The Huffington Post that Clinton has developed a fashion sense that never distracts from her role as a diplomat.
"I think Hillary Clinton's style is perfect. Perfect," she said. "You don't notice what she's wearing, you notice the woman... Whatever she's doing is absolutely right."
Rivers went on to assert that politicians should always dress conservatively in order to appear dignified to the public.
She explained: "You represent our country. Look simple. Let them watch your mouth. I like my politicians and my judges and my lawyers to be simple. I think if you worry about when your hemline is you're really not concentrating on the world crisis."
Earlier this week, Rivers predicted that Ricky Gervais's caustic monologue at the Golden Globes ceremony will prevent him from ever receiving an Academy Award nomination.