Flattering square necklines are back with our new designer square neckline prom dresses from Prom Headquarters. We have square neckline designer evening gowns with straps and in strapless styles by popular prom dress designers like Ellie Wilde and Tiffany Designs.

With a square neckline, the focus is on the graceful lines of a woman's collarbone. This neckline favors all figures, and it creates a lovely frame for an heirloom necklace. Our designer square neckline prom dress styles are also ideal for galas and other formal affairs.

You can see the best of these designs in our curated collection of designer prom dresses with square necklines. We have beautiful sparkling taffeta prom dresses by Tiffany Designs with square necklines and double spaghetti straps. Find plus-size square neckline prom dresses with beaded bodices and A-line skirts that sweep the floor.

From the design house of La Femme, we have a sleek jersey square neckline evening gown with a lace-up back. The floor-length skirt has a sexy leg slit.

From Blush, we have a two-piece square neckline prom dress in satin with beaded crop top and full ball gown skirt that comes with pretty pockets.

We have a glittery stretch lace prom dress by Johnathan Kayne with straight-across neckline. This designer evening dress has a fitted bodice over a short skirt with a floor-length overskirt in mesh with sparkling patterns.

When you submit a qualifying order, we send a free gift to complement your new designer prom dress. As an authorized retailer for all our famous-maker evening gown brands, our in-house professionals can offer expert answers on designers, sizing and styles.