Open Back Mermaid Prom Dresses
Open back mermaid prom dresses are having a main character moment, and you’re about to steal the spotlight. Ready to serve drama from every angle? These jaw-dropping styles are all about that curve-hugging fit and show-stopping exits—because why let your entrance have all the fun? Whether you’re going for sultry siren or glam goddess, these dresses are your ticket to being unforgettable. Get ready to turn heads, break hearts, and dance the night away like the queen you are.
$69.90
A navy blue knit mermaid dress featuring lace trim, flutter straps, ruching, and a lace-up back.
$79.90
A navy blue mermaid formal dress featuring a lace open back and side ruched seams.
$14.97 $109.90 86% off
An orange sequin bodycon dress with a high neckline, open back, and high front slit.
$109.90
A glamorous navy blue mermaid dress with sequins, a lace-up back, and a thigh-high slit.
$29.97 $109.90 73% off
A dazzling yellow sequin-embroidered mesh dress with a mermaid silhouette and adjustable spaghetti straps.
$74.90
A navy blue glitter knit mermaid dress with a square neckline and lace-up open back design.
$84.90
A glamorous black glitter knit mermaid dress featuring a bow-back design and floor-length train.
$119.90
A stunning lavender mermaid dress featuring sequin scrolls, lace-up back, and high slit.
$49.90
A coral satin mermaid dress featuring a lace-up back, high slit, and adjustable spaghetti straps.
$64.90
An elegant green satin mermaid dress with a lace-up back and flattering V-neckline.
$59.90
A mauve floral mesh mermaid dress with a lace-up back, high slit, and floor-length hem.
$89.90
A glamorous light blue mermaid dress with glitter knit fabric, ruching, and a stylish back cutout.
$19.97 $69.90 71% off
A pink glitter knit mermaid dress featuring a lace-up back, V-neckline, and high front slit.
$69.90
A striking red knit mermaid dress featuring a halter V-neckline and dramatic strappy open back.
$69.90
A navy blue mermaid dress with a strappy open back and sleek, stretchy knit fabric.
$69.90
A glamorous camel glitter mermaid dress featuring a sultry open back and sweetheart neckline.
$89.90
A lavender mermaid gown with a lace-up back and glitter lurex fabric for formal occasions.
$14.97 $119.90 88% off
An iridescent sequin mermaid dress in pink with a lace-up open back and floor-length hem.
$69.90
A brown mermaid formal dress featuring a halter V-neckline and open back in smooth knit fabric.
$139.90
A pink chiffon and mesh mermaid dress featuring a sequin-beaded bow pattern and tie-back design.
$79.90
A mint column formal dress with an open back, high slit, and ruched seams for elegance.
$79.90
A black satin mermaid dress featuring a halter neckline, open cross-back straps, and a high front slit.
$64.90
A navy blue knit mermaid dress featuring a cowl neckline, spaghetti straps, and an open tie-back design.
$74.90
A black glitter knit mermaid dress with a lace-up back and flattering V-neckline.
$29.97 $79.90 62% off
An orange mermaid dress with glitter knit fabric, cowl neckline, and lace-up back.
$69.90
A stunning green satin mermaid dress featuring a lace-up back and elegant high slit.
$84.90
A silver metallic mermaid dress with a cowl neckline and open strappy back for formal events.
$59.90
A mauve mesh mermaid dress featuring a lace-up back, sweetheart neckline, and elegant ruching.
$119.90
A glamorous periwinkle sequin dress featuring a strappy open back and high front slit.
$64.90
A wine velvet mermaid dress with a chic ruched halter neckline and partially open back.
$119.90
An orange mermaid dress with sequin embroidery, lace-up back, and a high front slit.
$69.90
A light blue mermaid dress with glitter, lace-up back, and high front wrap slit for formal events.
$79.90
A glamorous black mermaid dress with glitter knit fabric, open back, and high front slit.
$119.90
A coral mermaid dress with sequin embroidery, mesh lace-up back, and floor-sweeping godet accents.
$119.90
A glamorous denim sequin formal dress with a lace-up back and mermaid silhouette.
$79.90
A glamorous brown glitter formal dress featuring a strappy open back and high front slit.
$69.90
A chic strapless brown mermaid dress with a lace-up back and sleek knit fabric.
$19.97 $79.90 75% off
A black velvet mermaid dress featuring an open back with faux pearls and a dramatic sash.
$79.90
A black glitter mermaid dress with an open strappy back and floor-length silhouette.
$99.90
A green velvet mermaid dress with sequin embroidery and an adjustable lace-up open back.
$59.90
A sophisticated black velvet mermaid dress featuring a strapless neckline, lace-up back, and high front slit.
$49.97 $149.90 67% off
A glamorous periwinkle sequin dress with a sultry open back and flattering mermaid silhouette.
$29.97 $99.90 70% off
A coral sequin mermaid dress with a strappy back, perfect for prom or formal events.
$59.90
An olive green mesh mermaid dress featuring a ruched front, open back tie, and high slit.
$99.90
A dazzling denim sequin formal dress featuring a cutout open back and mermaid silhouette.
$79.90
A pink glitter knit mermaid dress with a lace-up back and adjustable spaghetti straps.
$99.90
A coral sequin formal dress with a lace-up back, high slit, and floor-length mermaid silhouette.
$79.90
A brown satin mermaid dress featuring a square neckline, padded cups, and an alluring open strappy back.
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Chic and glamorous, the Rowena sequin mermaid long dress will stylishly elevate your formal night-out look. With a lace-up strap design and fitted mermaid silhouette with a high slit, you'll deliver stunning style. Fit & FeaturesSheer mesh fabric, knit lining, moderate stretch, embroidered sequin scroll design, Sleeveless square neckline, padded bust, Spaghetti straps, open back, lace-up strap design, tie closure, Lower back zipper with hook and eye closure, High waist seam, Fitted floor-length mermaid silhouette, high front slit, Runs true to size, Where to Wear:Prom, black-tie parties and galas, fancy engagement parties Free Shipping on All Orders Over $75. | Windsor Rowena Sequin Mermaid Dress in Navy Blue | Size: M | Knit Fabric/Mesh Fabric/Sheer Mesh Fabric
Effortlessly elegant, the Sophie glitter knit mermaid dress would be a stunning choice for a formal gala. She features a square neckline, short puff sleeves, a partially open back with a lace-up strappy design for a customized fit, a high waist seam, a floor-length hem, and a mermaid silhouette with a high front slit to showcase your heels. The glitter knit fabric offers a moderate stretch. Complete the look in this long dress with rhinestone statement earrings. Fit & FeaturesSquare neckline, Short puff sleeves, Open back, lace-up strappy design, tie closure, High waist seam, Floor-length hem, mermaid silhouette, front slit, Glitter knit fabric, moderate stretch, Sticky bra or pasties recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Sophie Glitter Knit Mermaid Dress in Navy Blue | Size: S | Knit Fabric/Rhinestone
The Gwendolyn glitter knit bow-back mermaid dress will have you sparkling up the night with a glamorous allure! Make your entrance in this floor-length gown designed to turn heads with a curve-flaunting mermaid fit and backless design. Fit & FeaturesGlitter knit fabric, moderate stretch, Square neckline, spaghetti straps, Backless design, high waist seam, Bow-back accent, floor-length train, Floor-sweeping hem, mermaid silhouette, Runs true to size, Extra glitter for maximum sparkle - may have some natural fallout, Where to Wear:Weddings, black tie galas, formal dances, big birthday events, rehearsal dinners, engagement parties, red carpet occasions, upscale glam parties Free Shipping on All Orders Over $75. | Windsor Gwendolyn Glitter Knit Bow-Back Mermaid Dress in Black | Size: S | Knit Fabric
The Lucille formal satin dress will have you looking and feeling radiant and luxe! The dress captivates with a lace-up back, mermaid silhouette, and high front slit for effortless allure. Fit & FeaturesLined satin knit fabric, minimal stretch, Sleeveless square neckline, padded bust, adjustable spaghetti straps, Open lace-up back design, zipper and hook-eye closure, Fitted bodice, front ruched seam, high-cut slit, Mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, black tie galas, red-carpet events, nights at the opera or theatre, big milestone celebrations Free Shipping on All Orders Over $75. | Windsor Lucille Formal Satin Mermaid Dress in Coral | Size: L | Knit Fabric/Satin Fabric
Make it an elegant entrance in the Priscilla formal satin dress with a curve-hugging mermaid silhouette and floor-sweeping hem for dramatic flair. Fit & FeaturesLined silky satin fabric, minimal stretch, Strapless sweetheart neckline, Pleated, lightly padded bust, non-slip grip lining, Slim-fit bodice, high waist seam, hip-hugging fit, Floor-sweeping hem, mermaid silhouette, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, black-tie galas and events, and fancy milestone celebrations. Free Shipping on All Orders Over $75. | Windsor Priscilla Formal Satin Strapless Mermaid Dress in Sage | Size: L | Satin Fabric
Spend an evening in the timeless elegance of the Alicia floor-length formal dress and feel like a work of art! The side ruched seams accentuate your curves along the mermaid silhouette, and the high front slit adds a touch of drama to the floor-length hem. Fit & FeaturesSmooth knit fabric lined with stretchy knit, Padded bra cups, Back zipper and hook-eye closure, High front slit, Mermaid silhouette, Runs true to size, Where to Wear:Prom, galas, black tie parties, weddings, bridesmaids, nights at the theatre and opera, red-carpets Free Shipping on All Orders Over $75. | Windsor Alicia Off-The-Shoulder Mermaid Formal Dress in Brown | Size: M | Knit Fabric
Flattery will get you everywhere in the Delia formal long dress that boasts a flattering mermaid silhouette with a high front slit for effortless allure all evening! Fit & FeaturesLined smooth knit fabric, moderate stretch, Sleeveless cowl neck, pleating, Spaghetti straps, lace-up back, Mermaid silhouette, High front slit, floor-length hem, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, engagement parties, rehearsal dinners, milestone celebrations, dinner parties, and dressy date nights. Free Shipping on All Orders Over $75. | Windsor Delia Formal Cowl Neck Long Dress in Mauve | Size: XL | Knit Fabric
Stun in the Shay formal glitter dress that makes your entrance that much more glam! Shay features a mermaid silhouette that flaunts your beautiful curves and a floor-length hem for a hint of drama. Fit & FeaturesLine glitter lurex fabric, V-neckline, padded bra cups, Adjustable spaghetti straps, Ruching, mermaid silhouette, Wide banded hem, train , Runs true to size, Extra glitter for maximum sparkle - may have some natural fallout , Where to Wear: Prom, black tie galas and events, red-carpet events, upscale birthdays Free Shipping on All Orders Over $75. | Windsor Shay Formal Lurex Glitter Dress in Rose Gold | Size: XS
Prepare to make a grand entrance in the Ashelyn glitter long formal dress looking like a true masterpiece for prom or special birthday events! Her luxurious knit fabric boasts a mesmerizing glitter pattern, while the side ruching and mermaid silhouette accentuate your curves while the high front slit shows off your shoes of the night. The cowl neckline and padded bra cups offer a flattering and comfortable fit. Style this formal gown with glam earrings and a hair accessory for a stunning look all evening! Fit & FeaturesGlitter pattern, knit fabric lined with jersey knit, Padded bra cups, Adjustable spaghetti straps, High front slit, Back zipper and hook-eye closure, Mermaid silhouette, floor-length, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Ashelyn Cowl Neck Glitter Mermaid Formal Dress in Black | Size: XS | Knit Fabric
Sleek and sophisticated! The Emmie satin formal dress exudes elegance with a lace-up back and flattering mermaid silhouette that accentuates your figure. Fit & FeaturesStretchy satin-knit fabric, lined bust, Spaghetti straps, V-neckline, Lace-up back, Mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, black-tie galas, weddings, bridesmaids, formal parties, and red-carpet events. Free Shipping on All Orders Over $75. | Windsor Emmie Lace-Up Mermaid Satin Formal Dress in Sage | Size: XS | Satin Fabric
Open Back Mermaid Prom Dresses
When it comes to making a grand entrance, nothing turns heads quite like open back mermaid prom dresses. These stunners are for the bold, the fearless, the ones who want to live out their red-carpet dreams on the dance floor and aren’t afraid to serve main character energy all night long. The magic of a mermaid silhouette? It hugs your curves in all the right places, flaring out just below the knee for that dramatic, jaw-dropping effect—think “wow” with a side of “who is she?” An open back only ups the ante, adding a hint of sultry sophistication and letting you show off that confidence you’ve been working on all year. Whether you’re the queen of glitz or a minimalist with a love for sleek lines, these dresses are designed to make you feel like the ultimate prom goddess. They’re also a top pick for anyone who wants to stand out in those endless prom photos—trust, the open back is a detail that’ll have everyone double-tapping your posts and sliding into your DMs asking where you found your look.
Shopping for long mermaid prom dresses is basically a rite of passage. You’re not just picking a dress—you’re choosing the vibe for one of the most unforgettable nights of your life. Think about what makes you feel like *you*: maybe it’s a dress with a little sparkle that catches the light with every spin, or maybe it’s a sleek, satin finish that feels like pure luxury. Open back styles let you play with different hair and accessory moments, too. Imagine a loose, romantic updo with a few face-framing waves, or go bold with a slick ponytail and statement earrings—either way, you’ll be serving drama from every angle. And if you’re the friend who always goes all out for her girls, these dresses make incredible gifts for someone you want to spoil with a little extra glamour. Picture her face lighting up when she unwraps a dress that’s as unforgettable as she is. The best part? These show-stopping gowns aren’t just for prom. They’re perfect for any formal event where you want to channel your inner VIP, from banquets to black-tie weddings, or even that fancy gala you’ve been manifesting an invite to.
Choosing the perfect open back mermaid prom dress is all about balancing comfort with that “wow” factor. You want to be able to dance, pose, and live your best life without feeling restricted. Look for details like adjustable straps, supportive built-in cups, or a little stretch in the fabric so you can move like you own the place. And don’t forget the finishing touches—nude or metallic heels, a clutch that fits your must-haves, and maybe a swipe of highlighter to catch the light on your shoulders and back. If you’re ready to dive into the world of show-stopping silhouettes and unforgettable entrances, check out the collection of Long Open Back Prom Dresses for even more inspo. Whether you’re going solo, rolling deep with your besties, or hoping to snag a crown, these dresses are all about making you feel unstoppable. Prom night is your moment—go ahead and make it legendary.