Every wardrobe should have a semi formal dress. Whether you're shopping for a sexy cocktail dress, short prom dress, holiday party dress, dance formal or semi casual dress, Simply Dresses is your online dress store. Our collection of semi formal dresses has a vast array of short dresses in a myriad of colors and styles and offers some trendy alternatives to the little black dress. There are sexy cocktail dresses for an evening wedding guest or holiday celebration and short dresses with halter tops or strapless bodices that are fun and flirty for prom or party. We have some amazing cheap semi formal dresses that will fit your budget. Dress them up with accessories, an up do, and a sexy pair of sandals for prom or a hot date. They'll look great as homecoming dresses, dance formals or sweet sixteen party dresses. Make any occasion special in one of these semi formal designer dresses.