Square Neckline Bridesmaid Dresses

Square neckline bridesmaid dresses are here to turn your bridal party into an absolute vision—think modern romance with a side of major main character energy. This flattering silhouette brings those “effortlessly chic” vibes that every Windsor girl lives for, letting your squad serve looks from the aisle to the after-party. Whether you’re keeping it classic or making a bold statement, these dresses are ready to hype up your crew and guarantee all eyes stay right where they belong: on you and your ride-or-die besties.

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$36.90

3.75 star rating

A black knit midi dress with a sleeveless square neckline, ruching, and pleated mermaid silhouette.

$109.90

4.722891 star rating

A chic navy blue mermaid dress with sequins, featuring a lace-up back and thigh-high slit.

$36.90

4.657895 star rating

A denim satin mini dress with a ruched wrap silhouette and sleeveless square neckline.

$49.90

4.569231 star rating

A sleek black crepe dress with a form-hugging silhouette and elegant high-cut slit.

$59.90

4.589286 star rating

A stunning sage bodycon mini dress with sequin embroidery, halter straps, and an open lace-up back.

Best Seller

$44.90

4.571429 star rating

A sophisticated white midi dress featuring chiffon sleeves, a square neckline, and a ruched bodycon silhouette.

Best Seller

$39.90

4.051282 star rating

A chic white glitter lace dress with a bodycon fit, adjustable straps, and asymmetric hem.

$42.90

4.289474 star rating

A wine satin mini dress with rhinestone straps, ruched seams, and a form-hugging silhouette.

Sale

$46 $64.90 29% off

4.555555 star rating

A black crepe formal dress with puff sleeves, lace-up back, and a high-cut slit.

Best Seller

$84.90

4.558824 star rating

A black glitter knit mermaid dress with a bow-back design and floor-length train for formal occasions.

$49.90

4.827586 star rating

A coral satin mermaid dress featuring a lace-up back, high slit, and adjustable spaghetti straps.

Sale

$19.97 $54.90 64% off

4.157895 star rating

A burgundy formal dress with sheer mesh, bell sleeves, and a high-side slit for elegant occasions.

$46.90

4.785714 star rating

A black glitter crepe knit mini dress with sheer bell sleeves and a bodycon silhouette.

$49.90

4.642857 star rating

A black rhinestone-embellished mini dress with adjustable straps and a flattering A-line silhouette.

Best Seller

$38.90

4.230769 star rating

An ivory mini dress with a pleated bust, spaghetti straps, and an A-line silhouette.

Sale

$77 $109.90 30% off

4.416667 star rating

A royal blue mermaid dress with sequin scrolls, adjustable straps, and a high front slit.

$49.90

4.545455 star rating

A periwinkle bodycon mini dress featuring all-over sequin embroidery and a stylish cutout back.

$54.90

4.6 star rating

A black glitter knit midi dress with a form-hugging silhouette and chic wrap hem.

$46.90

3.444444 star rating

A sleek black bodycon midi dress with a square neckline and stretchy double-lined knit fabric.

Sale

$46 $64.90 29% off

3.444444 star rating

A black taffeta skater dress with a low back bow and elegant square neckline.

$37.90

3.555556 star rating

A navy blue glitter crepe mini dress with a sleeveless square neckline and bodycon silhouette.

Best Seller

$59.90

4.625 star rating

A sage satin slim-fit formal dress featuring a corset bodice, faux wrap-front, and floor-length hem.

$59.90

4 star rating

A light blue mesh formal dress with a square neckline, flexible boning, and a high side slit.

$89.90

4.625 star rating

A red glitter knit bodycon dress with a cutout underbust and adjustable spaghetti straps.

Best Seller

$42.90

4.625 star rating

A chambray satin mini dress featuring a pleated square neckline, spaghetti straps, and skater silhouette.

$49.90

4.666667 star rating

A radiant red satin midi dress with a corset bodice, adjustable straps, and a wrap slit.

$64.90

4.666667 star rating

A glamorous green mermaid dress with glitter knit fabric, ruching, and a high front slit.

$49.90

4.8 star rating

A lavender glitter skater dress with sheer peasant sleeves and a fit and flare silhouette.

$42.90

3.8 star rating

A light blue sleeveless skater dress with a ruffled silhouette and sleek square neckline.

Sale

$19.97 $64.90 69% off

4.75 star rating

A black satin slim-fit dress with a ruffled high-side slit and spaghetti straps.

$79.90

4 star rating

A chic black mermaid dress with a sheer mesh corset bodice and adjustable crisscross straps.

$79.90

4.666667 star rating

A glamorous black mermaid dress with glitter knit fabric, open back, and high front slit.

$76.90

4.666667 star rating

A navy blue mermaid dress with a chiffon tie-back and floral velvet pattern for formal occasions.

$59.90

3.5 star rating

An olive green mesh mermaid dress featuring a square neckline, ruched front, and alluring open back.

Sale

$19.97 $39.90 50% off

4.5 star rating

A khaki woven midi dress with a smocked bodice, ruffled hem, and dual spaghetti straps.

$99.90

4.5 star rating

A yellow mermaid sequin dress with a cutout back, high slit, and adjustable spaghetti straps.

Sale

$22.97 $49.90 54% off

5 star rating

A light blue chiffon midi dress with floral print, puff sleeves, and a chic high front slit.

$59.90

4 star rating

A stunning black lace dress featuring a high side slit and an elegant open-back design.

Best Seller

$69.90

3 star rating

A wine-colored knit mermaid dress featuring a halter square neckline and strappy open tie-back design.

$79.90

5 star rating

A brown satin mermaid dress featuring a square neckline, padded cups, and an alluring open strappy back.

Sale

$9.97 $45.90 78% off

5 star rating

A green glitter mesh mini dress with ruffled design and bodycon fit for glamorous nights out.

New Arrival

$69.90

5 star rating

An ivory satin mermaid gown featuring a floral print, lace-up back, and a dramatic high front slit.

$54.90

5 star rating

A sage floral sequin skater dress with a lace-up back and airy mesh fabric.

Best Seller

$59.90

A brown mesh mermaid dress featuring ruched seams, adjustable spaghetti straps, and a square neckline.

$54.90

A denim woven maxi dress featuring a flowy ruffled silhouette, square neckline, and spaghetti straps.

$52.90

A white floral A-line midi dress featuring puff short sleeves, a square neckline, and a flirty front slit.

$69.90

A sage satin mermaid dress featuring a lace-up back, high front slit, and adjustable spaghetti straps.

$44.90

An ivory satin skater dress featuring a square neckline, ruched bust, and adjustable shoulder straps.

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Windsor Rowena Sequin Mermaid Dress in Navy Blue
(166) 4.7228913 star rating

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

Sophie Glitter Knit Mermaid Dress in Navy Blue
(36) 4.4166665 star rating

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

Gwendolyn Glitter Knit Bow-Back Mermaid Dress in Black
(35) 4.571429 star rating

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

Lucille Formal Satin Mermaid Dress in Coral
(29) 4.827586 star rating

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

Windsor Priscilla Formal Satin Strapless Mermaid Dress in Sage
(25) 4.4 star rating

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

Alicia Off-The-Shoulder Mermaid Formal Dress in Brown
(24) 4.8333335 star rating

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

Delia Formal Cowl Neck Long Dress in Mauve
(21) 4.904762 star rating

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

Windsor Shay Formal Lurex Glitter Dress in Rose Gold
(20) 4.45 star rating

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

Ashelyn Cowl Neck Glitter Mermaid Formal Dress in Black
(20) 4.6 star rating

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

Emmie Lace-Up Mermaid Satin Formal Dress in Sage
(20) 4.55 star rating

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

Square Neckline Bridesmaid Dresses

When it comes to curating a wedding party look that’s equal parts modern and timeless, square neck bridesmaid dresses are the ultimate power move. There’s something about that clean, angular neckline—it’s all at once classic and totally on-trend, the kind of detail that makes your besties look like runway icons and feel like the main character. The square neckline is a total crowd-pleaser, flattering every body shape and bringing that polished, elegant vibe that photographs like a dream. Whether you’re planning a big, bold celebration or keeping it intimate and sweet, bridesmaid dresses with square necklines are the secret sauce for creating a cohesive look that still lets every member of your squad shine. Picture your girls lined up, each one serving her own brand of confidence, the straight-across neckline framing their faces and jewelry perfectly, and you’ll know you made the right call.

Shopping for square neck bridesmaid dresses is all about dialing in those little details that turn a dress into *the* dress. Think about the fabric—flowy chiffon for that ethereal, floaty feel, or luxe satin for a bit of shine and drama. The silhouette is your playground: go for fitted if you want to channel that sophisticated energy, or opt for an A-line if twirling is on your agenda. And sleeves? Don’t even get us started. A square neck bridesmaid dress with sleeves brings a whole new level of chic, whether you’re vibing with delicate flutter sleeves, sleek long sleeves, or something in between. These dresses aren’t just for the wedding day, either. They’re the kind of pieces your girls will want to wear again, whether it’s for a fancy dinner, a cocktail party, or just because they want to feel a little extra. If you’re shopping for your crew, consider their personal styles and comfort levels—think about who loves a little arm coverage or who wants to go full glam with a sleeveless look. And if you’re a bridesmaid yourself, don’t be shy about sharing your dream dress inspo with the bride. This is your moment to feel amazing, after all.

Let’s be real: gifting a bridesmaid dress isn’t the most traditional move, but if you’re the bride with a vision (or a bridesmaid with a soft spot for treating your besties), there’s something incredibly special about picking out a dress that will be part of such a core memory. Square necklines are universally flattering, so you can feel confident that everyone will look—and feel—their best. Plus, the versatility is unmatched. Dress it up with statement earrings and strappy heels, or keep it simple and let the neckline do all the talking. If you’re looking to mix things up even more, consider pairing square neck styles with other necklines for a perfectly mismatched bridal party vibe, or check out other iconic options like Strapless Bridesmaid Dresses for a little extra inspo. At the end of the day, square neck bridesmaid dresses are more than just a trend—they’re a statement. They say your crew is stylish, confident, and ready to celebrate every wild, unforgettable moment with you. So go ahead, embrace that square neckline energy and get ready to turn every aisle into your own personal runway.

Top Picks For Square Neckline Bridesmaid Dresses