Long Mermaid Prom Dresses
Dive into the enchanting world of long mermaid prom dresses where every step you take is a swish of elegance and a splash of glam! These stunning gowns are your ticket to making a jaw-dropping entrance and leaving a trail of admirers in your wake. With their curve-hugging silhouettes and dramatic flares, you'll feel like the queen of the oceanic ball, ready to dance the night away. Whether you're channeling red carpet vibes or aiming for that fairy-tale fantasy, our collection of long mermaid prom dresses promises to make waves at any event. So go ahead, let your inner siren shine and own that spotlight like the fearless fashionista you are!
$109.90
A glamorous purple sequin mermaid dress with a lace-up open back and thigh-high slit.
$109.90 - $149.90
A light blue mermaid dress with sequin-scroll mesh, padded bust, and lace-up back for formal events.
$109.90
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.
$46 $64.90 29% off
A black crepe formal dress with puff sleeves, lace-up back, and a high-cut slit.
$119.90
A glamorous lavender mermaid dress with sequin scrolls, lace-up back, and high slit.
$84.90
A glamorous light blue glitter knit mermaid dress featuring a chic bow-back and floor-length train.
$89.90
A luxurious green knit mermaid dress featuring an off-the-shoulder neckline and dramatic high front slit.
$69.90
A stunning denim satin mermaid dress with a strapless sweetheart neckline and floor-sweeping hem.
$99.90
A mint sequin scroll mermaid dress with a strappy back, perfect for prom or black-tie events.
$59.90 - $64.90
A pink knit mermaid dress with a cowl neck, lace-up back, and high front slit.
$79.90
A red knit mermaid dress with glitter, cowl neckline, and high front slit for formal events.
$64.90
An elegant green satin mermaid dress with a lace-up back and flattering V-neckline.
$69.90
A sage off-the-shoulder mesh dress with ruffled accents and a flattering mermaid silhouette.
$79.90
A light blue mermaid gown with faux pearl mesh, sweetheart neckline, and adjustable spaghetti straps.
$59.90
A stunning red mesh mermaid dress with ruched seams and adjustable spaghetti straps for formal occasions.
$69.90
A stunning black sleeveless mermaid dress with glitter fabric and adjustable spaghetti straps for formal events.
$77 $109.90 30% off
A stunning royal blue mermaid dress with sequins, adjustable straps, and a high front slit.
$79.90
A stunning white mermaid dress with faux pearl embellishments and a cold shoulder neckline.
$89.90
A glamorous burgundy mermaid dress with glitter knit fabric, ruching, and a stylish back cutout.
$19.97 $69.90 71% off
A pink glitter knit mermaid dress with a lace-up back and high front slit.
$149.90
A lavender mermaid dress with sequin floral embroidery and a lace-up back for a fairytale look.
$59.90
A black crepe mermaid dress with a square halter neckline and elegant high front slit.
$69.90
A navy blue mermaid dress with a strappy open back and sleek, stretchy knit fabric.
$69.90
A wine-colored mermaid dress with glitter crepe fabric, cutout bodice, and high front wrap slit.
$99.90
A sage mermaid formal dress featuring a halter V-neckline and elegant tie-back design.
$89.90
A lavender mermaid gown with a lace-up back and glitter lurex fabric for formal occasions.
$64.90
A green glitter knit mermaid dress with ruched detailing, spaghetti straps, and a high front slit.
$119.90
A stunning pink mermaid dress with sequin beaded embroidery and a satin strapless pleated neckline.
$149.90
A stunning yellow mermaid dress adorned with beaded pearls and a dramatic lace-up back.
$69.90
A brown mermaid formal dress featuring a halter V-neckline and open back in smooth knit fabric.
$69.90
A captivating blue mermaid dress featuring glitter fabric, an open back, and a sweetheart neckline.
$69.90
A green off-the-shoulder mermaid dress with glitter fabric, ruched bust, and high front slit.
$64.90
A green knit mermaid dress with a cowl neckline, spaghetti straps, and a high front slit.
$84.90
An enchanting black mermaid dress with glitter mesh, ruffle-back, and adjustable spaghetti straps.
$39.97 $79.90 50% off
A glamorous green mermaid dress featuring glitter fabric, lace-up design, and a high front slit.
$63 $89.90 30% off
A green sequin mermaid dress with a boho pattern, adjustable straps, and a floor-length hem.
$74.90
A black glitter knit mermaid dress with a lace-up back and side ruched seams.
$79.90
A chic black mermaid dress featuring a sheer mesh corset bodice and adjustable crisscross straps.
$74.90
A black glitter knit mermaid dress with a halter neckline and high front wrap slit.
$84.90
A silver metallic mermaid dress with a cowl neckline and open back for formal occasions.
$149.90
A white mermaid dress with beaded embellishments, open-back design, and adjustable spaghetti straps.
$59.90
A mauve mesh mermaid dress with a sweetheart neckline and lace-up back for formal occasions.
$99.90
A navy blue velvet mermaid dress with sequin embroidery and an open lace-up back.
$119.90 - $129.90
A lime yellow sequin mermaid dress with a corset bodice and high front slit.
$79.90
A stunning black satin mermaid dress with a high slit, adjustable straps, and a romantic train.
$79.90
A strapless lavender mermaid dress with a glittery finish and a high front wrap slit.
$64.90
A wine velvet mermaid dress with a chic ruched halter neckline and partially open 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
Windsor Lola Formal High Slit Glitzy Glitter Dress in Navy Blue
$29.97 $59.90
50% off
Flaunt your glam style in the fabulous Lola high slit glitter dress! She features a trendy cowl neckline with a slim-fit bodice, a floor-sweeping silhouette with a sultry high side slit to elongate your legs, and a form-hugging fit. She is composed of glitzy glitter knit fabric that offers a curve-hugging fit with a moderate stretch. Pair this gorgeous long dress with a sleek ring set to add some glamour to your look for your special occasion. Fit & FeaturesCowl neckline, spaghetti straps, Slim-fit bodice, form-hugging fit, Floor-length silhouette, Thigh-high side slit, Glitter knit fabric, mini-length inner knit lining, moderate stretch, Sticky bra recommended, Runs true to size, The saturation of glitter varies. Glitter may transfer. Free Shipping on All Orders Over $75. | Windsor Lola Formal High Slit Glitzy Glitter Dress in Navy Blue | Size: L | Knit 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. She features a sleeveless square neckline, a bold backless design, a high waist seam, a chic bow accent at the lower back with a flowy floor-length train, a floor-sweeping hem with a mermaid silhouette, and a form-hugging fit. Style this long dress with a rhinestone clutch for a black-tie wedding. Fit & FeaturesSleeveless square neckline, spaghetti straps, Backless design, high waist seam, Bow-back accent, floor-length train, Floor-sweeping hem, mermaid silhouette, Form-hugging fit, Glitter knit fabric, Sticky bra or pasties recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Gwendolyn Glitter Knit Bow-Back Mermaid Dress in Light Blue | Size: L | Knit Fabric/Rhinestone
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
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 Green | Size: S | Knit 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 Taupe | Size: M | Satin Fabric
Sleek and sultry, the Kathie formal satin dress is destined to shine at banquets, galas, and black-tie weddings! She features a sophisticated one-shoulder neckline, a wide shoulder strap, a pleated side seam, a mermaid silhouette, and an asymmetrical high front slit along her graceful long hem. The formal dress is composed of luxurious satin-lined fabric with a sheen effect and minimal stretch. Complete the look with hoop earrings. Fit & FeaturesOne-shoulder neckline, wide shoulder strap, Back zipper and hook-eye closure, Pleated side seam, asymmetrical high front slit, Mermaid silhouette, long hem, Lined silky satin fabric, sheen effect, minimal stretch, Strapless bra or pasties recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Kathie Formal Satin One-Shoulder Dress in Gold-2 | Size: M | Satin 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
Radiate sexy elegance in the Deyna formal long dress perfect for your upcoming black tie soirees! The dress accentuates your curves with side ruched seams and mermaid silhouette create a stunning and flattering shape, while the floor-length hem adds sophistication. Fit & FeaturesAiry mesh fabric, full knit stretchy lining, Off-the-shoulder neckline, ruffled cuffs, cascading ruffles, Back zipper and hook-eye closure, Flexible boning inserts in the bodice, Side ruched seams, mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, weddings, fancy garden parties, and dressed-up events. Free Shipping on All Orders Over $75. | Windsor Deyna Formal Mesh Off-The-Shoulder Long Dress in Periwinkle | Size: L | Knit Fabric/Mesh Fabric/Mesh Fabric
Long Mermaid Prom Dresses
When it comes to making an entrance that no one will forget, long mermaid prom dresses are the ultimate game-changer. Picture this: you glide across the dance floor, the dramatic flare of your skirt trailing behind you, catching the light with every step—yeah, you’re basically the main character and everyone knows it. The mermaid silhouette is all about that snatched waist and the perfect hourglass moment, hugging your curves in all the right places before flaring out at the knee for maximum drama. It’s the dress you wear when you want to serve confidence, glamour, and a little bit of mystery, whether you’re channeling old Hollywood vibes or going full-on modern siren. These dresses are a go-to for anyone who’s ready to own the night, from the prom queen hopeful to the girl who just wants to dance until her feet hurt. And let’s not forget, a mermaid prom dress isn’t just a look—it’s a whole mood. It’s for the girl who loves a little sparkle, adores a bold train, and isn’t afraid to be the center of attention. Whether you’re shopping for yourself or helping your BFF find her dream dress, this is the silhouette that turns prom night into an absolute fairytale.
Shopping for a mermaid theme prom dress is basically like prepping for your own red carpet moment. The details matter—think luxe fabrics that move with you, dazzling embellishments that catch every flash of the camera, and colors that make your skin glow. If you’re all about the drama, go for a long mermaid dress with a high slit or a plunging neckline; if you’re more of a classic beauty, a sweetheart or off-the-shoulder neckline is always timeless. Don’t forget to think about comfort—yes, you want to look like a goddess, but you also want to be able to dance, twirl, and maybe even run for that late-night food truck with your squad. These dresses are also a super thoughtful gift for a sister, cousin, or bestie who’s about to have her prom moment. Imagine handing her a dress that makes her feel like she can conquer the world—talk about best friend points! And if you’re the one getting ready for the big night, don’t be afraid to go all out with your accessories: sky-high heels, statement earrings, and a sparkling clutch are basically required. The beauty of mermaid prom dresses is that they’re as versatile as you are. Whether you want to keep it sleek and minimal or go full-on glam with sequins and lace, there’s a long mermaid dress that fits your vibe.
Ready to make your mermaid prom dreams a reality? There’s a whole world of inspiration waiting for you, from bold jewel tones to soft pastels, from all-out glitter to understated satin. The best part? You get to write your own story—maybe you’re the girl who’s been dreaming about this night for months, or maybe you’re the spontaneous queen who found her dress at the last minute and still stole the show. Either way, the magic is in the details and the confidence you bring to the look. If you’re still searching for that perfect fit, or if you want to see more options before making your final pick, check out our curated collection of Mermaid Formal Dresses for even more jaw-dropping styles. Whether you’re going for classic elegance or bold, head-turning glamour, the long mermaid prom dress is your ticket to an unforgettable night. Get ready to live your main character moment, make memories that’ll last forever, and leave everyone wondering how you managed to look so effortlessly iconic.