LONG PROM DRESSES, LONG FORMAL DRESSES, AND LONG PROM GOWNS

Browse our large selection of elegant long prom dresses, and find the perfect long formal dresses for your prom. At PromGirl you will find many long prom dresses and gowns from the top formal dress designers and manufacturers.  A long dress makes an elegant statement at any formal event whether it is prom, a formal dance, or wedding. Shop our huge selection of long dresses, and you will find long elegant dresses priced to fit every budget. Whatever the event you are looking for, we have your perfect long dress.

In Stock Buy Floor Length Strapless Dress at PromGirl
  • Electric Blue
  • Neon Salmon

Long Strapless Casual Dress

$49.00 $19.00 CT-9500M64D
In Stock Buy Long Sleeveless Chevron Print Dress at PromGirl
  • Navy/Lime

Long Sleeveless Chevron Print Dress

$49.00 $19.00 EM-CFA-1472
In Stock Buy Sleeveless Long Striped Dress at PromGirl
  • Black/Tan/Coral

Sleeveless Long Striped Dress

$39.00 $19.00 EM-CAG-1116
In Stock Buy Strapless Floor Length Dress at PromGirl
  • Yucca

Strapless Floor Length Dress

$69.00 $19.00 CT-9500W88B
In Stock Buy Floor Length Spaghetti Strap Print Dress at PromGirl
  • Cream/Navy

Floor Length Spaghetti Strap Print Dress

$69.00 $19.00 AS-I960450g2
In Stock Buy Long Sleeveless Chevron Print Dress at PromGirl
  • Navy/Multi

Long Sleeveless Chevron Print Dress

$29.00 $19.00 EM-CCX-1571-438
In Stock Buy One Shoulder Casual Print Dress at PromGirl
  • Ivory/Royal

One Shoulder Casual Print Dress

$69.00 $19.00 CT-2631BM1D
In Stock Buy Floor Length Strapless Dress at PromGirl
  • Yucca

Floor Length Strapless Dress

$49.00 $19.00 CT-9500M64F
In Stock Buy Floor Length Sleeveless Dress at PromGirl
  • Ivory/Black

Floor Length Sleeveless Dress

$49.00 $25.00 SS-X28701TLV
In Stock Buy Floor Length Spaghetti Strap Dress at PromGirl
  • Black

Floor Length Spaghetti Strap Dress

$49.00 $29.00 JU-47244
In Stock Buy Floor Length Strapless Empire Waist Dress at PromGirl
  • Light Yellow

Long Strapless Yellow Dress

$199.00 $29.00 SS-X28751TNY
In Stock Buy Floor Length Strapless Pleated Dress at PromGirl
  • Purple

Strapless Purple Prom Gown with Open Back

$199.00 $39.00 SS-X27091MDU
In Stock Buy Floor Length Strapless Sweetheart Print Dress at PromGirl
  • Purple
  • Fuchsia

Strapless Print Prom Dress

$219.00 $49.00 DQ-8088
In Stock Buy One Shoulder Floor Length Dress at PromGirl
  • Ivory

One Shoulder Floor Length Dress

$149.00 $49.00 MY-3725SK1N
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Turquoise

Strapless Turquoise Blue Prom Dress

$189.00 $49.00 SS-X26641TD9
In Stock Buy Floor Length Deep V-Neck Dress at PromGirl
  • Coral/Gold

Floor Length Deep V-Neck Dress

$250.00 $49.00 X-Xs2608
In Stock Buy Long Metallic One Shoulder Dress at PromGirl
  • Teal Crush
  • Violet Crush

Long Metallic One Shoulder Dress

$298.00 $49.00 FL-P5863
In Stock Buy Long One Shoulder Dress at PromGirl
  • Black
  • Royal Blue

One Shoulder Formal Gown

$229.00 $59.00 DQ-8095
In Stock Buy Floor Length Elegant Halter Gown at PromGirl
  • Dark Coral

Halter Prom Gown

$110.00 $59.00 BD-DYO67007
In Stock Buy Sleeveless Ruched V-Neck Dress at PromGirl
  • Royal

Sleeveless Ruched V-Neck Dress

$129.00 $64.00 BD-DY2611479
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Periwinkle/Nude/Ab

Bee Darlin Strapless Prom Gown

$139.00 $69.00 BD-DY586477
In Stock Buy High Low Sleeveless Dress at PromGirl
  • Jade
  • Black/Peach

High Low Sleeveless Dress

$69.00 DI-DH1005
In Stock Buy Long Blue Dress by XOXO at PromGirl
  • Blue

Long Blue Prom Dress by XOXO

$79.00 XO-2133SSK1
In Stock Buy Black Halter Pantsuit by XOXO at PromGirl
  • Black

Black Halter Pantsuit by XOXO

$79.00 XO-9197MLR8
In Stock Buy Strapless Formal Dress at PromGirl
  • Royal
  • Burgundy
  • Black
  • Plum
  • Olive
  • Gold
  • White

Long Formal Gown 29283

$99.00 SF-29283
In Stock Buy Lace Floor Length Strapless Sweetheart Dress at PromGirl
  • Eggplant
  • Champagne
  • Navy
  • Fuchsia
  • Royal

Long Strapless Lace Dress

$99.00 DI-K0347B
In Stock Buy Long One Shoulder Dress at PromGirl
  • Black
  • Plum
  • Brown

One Shoulder Prom Gown

$99.00 DQ-8324
In Stock Buy Strapless Glitter Peplum Dress at PromGirl
  • Coral

Strapless Glitter Peplum Dress

$99.00 EM-CHL-1023-680
In Stock Buy Floor Length Sleeveless Dress at PromGirl
  • Black

Floor Length Sleeveless Dress

$99.00 DI-DD177-0807
In Stock Buy Cap Sleeve Floor Length Lace Dress at PromGirl
  • Peach
  • Blue

Long Cap Sleeve Lace Dress by Morgan

$249.00 $99.00 MO-11809
In Stock Buy High Low Halter Dress at PromGirl
  • Coral
  • Black
  • Mint
  • Turquoise
  • Purple

High Low Halter Dress

$99.00 DQ-8581
In Stock Buy Burgundy Formal Gown at PromGirl
  • Royal
  • Burgundy
  • Black
  • Plum
  • Olive
  • Gold
  • White

Burgundy Formal Gown

$99.00 SF-29283b
In Stock Buy Long V-neck Prom Dress at PromGirl
  • Royal
  • Green
  • Periwinkle
  • Lavender
  • Turquoise
  • Red
  • Ivory

Long V-neck Prom Dress

$99.00 TW-4044r
In Stock Buy Long Strapless Sweetheart Formal Gown at PromGirl
  • Morganite
  • White
  • Water

Strapless Long Prom Dress by Alyce

$198.00 $99.00 AL-35595
In Stock Buy Floor Length Strapless Chiffon Gown at PromGirl
  • Wow Pink
  • Kelly Green

Strapless Formal Gown by Alyce 35442

$230.00 $99.00 AL-35442
In Stock Buy Long One Shoulder Open Back Gown at PromGirl
  • Bubble Gum
  • Light Green
  • Lemon

Long One Shoulder Open Back Gown

$298.00 $99.00 NC-1015
In Stock Buy Long Strapless Open Back Gown at PromGirl
  • Sky Blue
  • Tangerine

Long Strapless Open Back Gown

$230.00 $99.00 AL-35590
In Stock Buy Strapless Chiffon Floor Length Dress at PromGirl
  • Mint
  • Ivory

Strapless Chiffon Floor Length Dress

$260.00 $99.00 BJ-A59849
In Stock Buy Long Strapless Sweetheart Evening Gown at PromGirl
  • Hot Violet
  • Electric Pink

Strapless Beaded Gown by Flirt

$278.00 $99.00 FL-P5830
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Peach

Elegant Strapless Evening Gown

$229.00 $114.00 DQ-8645
In Stock Buy Long Strapless Sweetheart Dress at PromGirl
  • Peony
  • Kelly Green

Long Strapless Sweetheart Dress

$240.00 $120.00 BJ-866
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Lavender

Jeweled Strapless Long Prom Dress

$264.00 $132.00 CD-0998
In Stock Buy Floor Length Strapless Prom Dress at PromGirl
  • Aqua

Floor Length Strapless Prom Dress

$278.00 $139.00 SN-50558
In Stock Buy Long Strapless Sweetheart Empire Waist Dress at PromGirl
  • White
  • Bright Purple

La Femme Designer Prom Gown

$278.00 $139.00 LF-18313
Buy Floor Length Halter Prom Dress at PromGirl
  • Blush

Floor Length Halter Prom Dress

$149.00 MY-6644SJ1S
Buy Pleated Blue Velvet Prom Dress at PromGirl
  • Blue Velvet

Pleated Blue Velvet Prom Dress

$149.00 CT-8420RD1B
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • White
  • Royal

Beaded Strapless Prom Dress

$149.00 BD-067A104
In Stock Buy Floor Length Strapless Sweetheart JVN by Jovani Dress at PromGirl
  • Aqua
  • Blush

Strapless Prom Gown JVN by Jovani

$270.00 $149.00 JO-JVN-JVN2563
In Stock Buy Floor Length Halter Dress at PromGirl
  • Royal/Silver

Floor Length Halter Dress

$156.00 BN-55239
In Stock Buy Floor Length Halter Dress  at PromGirl
  • White

Halter Prom Gown with Cut Out Sides

$313.00 $156.00 CD-0981
In Stock Buy Elegant Strapless Sweetheart Dress at PromGirl
  • Hot Coral

Long Prom Dress by La Femme 18710

$318.00 $159.00 LF-18710
In Stock Buy Strapless Silver Dress at PromGirl
  • Silver (Silver/Black)
  • Plum (Plum/Black)
  • Cinnamon
  • Fuchsia/Black

Strapless Prom Gown

$169.00 NA-2554
In Stock Buy Long Sequin Prom Dress at PromGirl
  • Navy Blue
  • Gold
  • Silver

Sleeveless Sequin Gown

$169.00 DQ-8694
In Stock Buy Floor Length Sleeveless Dress at PromGirl
  • Black

Floor Length Sleeveless Dress

$169.00 JU-MA-261355i
In Stock Buy Long One Shoulder Dress at PromGirl
  • Black
  • Gold
  • Ivory

Long One Shoulder Dress

$169.00 DQ-8279
* Products with an "in stock" banner have at least some size and color combinations ready to ship immediately. Available sizes and colors may be limited due to seasonality. Please read our complete availability policy for more information.