Yes, Mars has iron in its composition. Mars has a reddish color due to oxidized iron in its soil, which is why the planet is commonly called the "Red Planet." Iron oxide, or rust, gives the soil and dust of Mars its distinctive reddish hue. The surface of Mars is rich in iron oxides and other metal oxides. The red dust that covers much of the Martian surface is largely composed of iron oxide. In fact, Mars is sometimes referred to as the "Rusty Planet" because of the abundance of iron oxide on its surface.