Mermaid Prom Dresses

Shop mermaid prom dresses at ONTOEFY for a dramatic, hourglass silhouette. A fitted bodice hugs the waist and hips before flaring at the knee, creating a red-carpet look for prom photos.

Our collection includes satin and chiffon mermaid gowns with corset bodices, draped details, high slits, and lace-up backs. Choose black, red, burgundy, navy, emerald, and sage. Sizes 2-28, with custom sizing on selected styles.

Explore all prom dresses, corset prom dresses, or ball gown prom dresses.

Compare silhouettes in our mermaid vs ball gown guide.


I’m absolutely in love with my hoco dress! The quality is amazing, the fabric is soft and comfortable, and the fit is perfect. It’s stylish, flattering, and looked stunning at the dance. I got so many compliments all night long. Shipping was fast, and it’s totally worth the price. Highly recommend!
—— Mia S.

Ordina per:
Peach floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Peach Floral Sweetheart Mermaid Floor-Length Prom Dress for Evening Banquet

$93.99$118.99
Sage Green floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Draped Off Shoulder Mermaid Floor-Length Prom Dress for Awards Dinner

$107.99
Navy Blue floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Glitter V Neck Mermaid Floor-Length Prom Dress for Formal Party

$95.99
Black floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Slit V Neck Mermaid Floor-Length Prom Dress for Ballroom Event

$109.99
Fuchsia floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Cut-Out Bow Slit Sweetheart Mermaid Floor-Length Satin Prom Dress for Spring Formal

$114.99
Black floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Black Corset Slit Sweetheart Mermaid Floor-Length Prom Dress for Ballroom Event

$110.99
Royal Blue floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Backless Sweetheart Mermaid Floor-Length Satin Prom Dress for Celebration Dinner

$93.99
Burgundy floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Corset Embroidered Sweetheart Mermaid Floor-Length Tulle Prom Dress for Formal Reception

$90.99
Dark Navy floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Corset Beaded Sweetheart Mermaid Floor-Length Tulle Prom Dress for Hotel Gala

$104.99
Burgundy floor-length prom dress, front view showing the a-line silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Embroidered Sequin V Neck A-Line Floor-Length Prom Dress for Spring Formal

$115.99
Grape floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Backless V Neck Mermaid Floor-Length Satin Prom Dress for Senior Prom

$98.99
Gold floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Beaded Slit Sweetheart Mermaid Floor-Length Satin Prom Dress for Awards Dinner

$109.99
Champagne floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Champagne Beaded Embroidered V Neck Mermaid Floor-Length Tulle Prom Dress for Black Tie Event

$92.99
Emerald Green floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Corset Slit Sweetheart Mermaid Floor-Length Satin Prom Dress for Pageant

$106.99
Red floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Corset Slit Sweetheart Mermaid Floor-Length Satin Prom Dress for Gala

$89.99
Gold floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Beaded Embroidered Off Shoulder Mermaid Floor-Length Velvet Prom Dress for Formal Dance

$103.99
Black floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Corset Beaded Off Shoulder Mermaid Floor-Length Tulle Prom Dress for Prom Night

$117.99
Gold floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Corset Beaded Slit Sweetheart Mermaid Floor-Length Tulle Prom Dress for Evening Event

$100.99
Gold floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Gold Ruched Corset Slit Sweetheart Mermaid Floor-Length Satin Prom Dress for Special Occasion

$114.99
Black floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Flower-Applique Floral Slit One Shoulder Mermaid Floor-Length Satin Prom Dress for Formal Party

$97.99
Lavender floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Corset Tiered Ruffled Sweetheart Mermaid Floor-Length Tulle Prom Dress for Celebration Dinner

$94.99
Ocean Blue floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Sequin Slit V Neck Mermaid Floor-Length Prom Dress for Evening Ceremony

$108.99
Royal Blue floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Draped Slit Sweetheart Mermaid Floor-Length Satin Prom Dress for Evening Ceremony

$91.99
Burgundy floor-length prom dress, front view showing the mermaid silhouette
US 2US 4US 6US 8US 10US 12US 14US 16WUS 18WUS 20WUS 22WUS 24WUS 26WUS 28W

Ruched Draped Slit Cowl Neck Mermaid Floor-Length Satin Prom Dress for Charity Ball

$119.99

Free Custom Size

Customised sizes at no extra cost

Return Policy

We offer Worry-Free Returns for standard sizes within 14 days.

Expedited Shipping

Expedited Shipping delivered within 3-8 business days

Secure Payment

Your payment information is proccessed securely.