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/Multi

Long Sleeveless Chevron Print Dress

$29.00 $19.00 EM-CCX-1571-438
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 Strapless Glitter Peplum Dress at PromGirl
  • Coral

Strapless Glitter Peplum Dress

$129.00 $29.00 EM-CHL-1023-680
In Stock Buy Neon Coral Jumpsuit at PromGirl
  • Neon Coral

Neon Coral Jumpsuit

$59.00 $29.00 AC-NJ72661B
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 High Low Strapless Sweetheart Dress at PromGirl
  • Seafoam Mist

Strapless High Low Dress for Homecoming

$69.00 $34.00 CT-9351BV1B
In Stock Buy Floor Length Scoop Neck Dress at PromGirl
  • Ivory
  • Blue

Floor Length Scoop Neck Dress

$69.00 $34.00 LP-22318
In Stock Buy Strapless Print Maxi Dress at PromGirl
  • Orange/Green

Strapless Print Maxi Dress

$39.00 CT-2848UT4B
In Stock Buy Long Halter Print Maxi Dress at PromGirl
  • Coral/Blue

Long Halter Print Maxi Dress

$39.00 CT-2957QJ2F
In Stock Buy Long Strapless Print Maxi Dress at PromGirl
  • Navy/Ivory

Long Strapless Print Maxi Dress

$39.00 EM-CBZ-2042-427
In Stock Buy Floor Length Sleeveless Dress at PromGirl

Floor Length Sleeveless Dress

$79.00 $39.00 LP-21331
In Stock Buy Strapless Chevron Print Maxi Dress at PromGirl
  • Navy/Coral

Strapless Chevron Print Maxi Dress

$39.00 EM-CBZ-1539-436
In Stock Buy Long One Shoulder Evening Dress at PromGirl
  • Black

Long One Shoulder Evening Dress

$79.00 $39.00 LP-22850
In Stock Buy Sleeveless Print Maxi Dress at PromGirl
  • Off White/Indigo

Sleeveless Print Maxi Dress

$39.00 CT-2770AX2M
In Stock Buy Floor Length Sleeveless Lace Dress at PromGirl
  • Black

Floor Length Sleeveless Lace Dress

$79.00 $39.00 LP-22890
In Stock Buy Long Print Popover Maxi Dress at PromGirl
  • White/Blue

Long Print Popover Maxi Dress

$39.00 SS-JA75742C130
In Stock Buy Floor Length Strapless Sweetheart Dress at PromGirl
  • Deep Blue Ocean

Long Strapless Blue Dress for Prom

$99.00 $49.00 CT-8420NN3E
In Stock Buy Long Blue Dress by XOXO at PromGirl
  • Blue

Long Blue Prom Dress by XOXO

$129.00 $49.00 XO-2133SSK1
In Stock Buy Floor Length Open Back Lace Gown at PromGirl
  • Coral

Floor Length Open Back Lace Gown

$149.00 $49.00 JU-47705
In Stock Buy Sequin Spaghetti Strap Illusion Dress at PromGirl
  • Black

Sequin Spaghetti Strap Illusion Dress

$99.00 $49.00 DI-DD134-0613
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 Long Sleeveless Empire Waist Dress at PromGirl
  • Blue

Long Sleeveless Empire Waist Prom Dress

$99.00 $49.00 MY-6661ix1n
In Stock Buy Floor Length Strapless Dress at PromGirl
  • Blue
  • White

Floor Length Strapless Dress

$99.00 $49.00 MT-7244
In Stock Buy One Shoulder Floor Length Dress at PromGirl
  • Royal Blue

One Shoulder Prom Gown by Ruby Rox

$99.00 $49.00 RR-CGX2207i
In Stock Buy Long Sleeveless Sequin Prom Dress at PromGirl
  • Dark Rose/White
  • Gold/White

Long Sleeveless Sequin Prom Dress

$99.00 $49.00 MB-6792
In Stock Buy Classic Long Strapless Sweetheart Gown at PromGirl
  • Plum

Classic Long Strapless Gown

$99.00 $50.00 PO-5986
Buy Floor Length Sleeveless La Femme Prom Dress at PromGirl
  • Gold

Gold Dress by La Femme 13191

$378.00 $58.00 LF-13191
Buy High Low V-Neck Halter Gown by La Femme at PromGirl
  • Black/White

High Low V-Neck Halter Gown by La Femme

$198.00 $58.00 LF-GI-13227
In Stock Buy Floor Length Scoop Neck Lace Embellished Dress at PromGirl
  • Black

Open Back Black Lace Gown

$59.00 EM-CHN-1446
In Stock Buy Floor Length One Shoulder Dress at PromGirl
  • Gunmetal

Floor Length One Shoulder Dress

$149.00 $59.00 MQ-808888
In Stock Buy High Low Sequin V-Neck Dress at PromGirl
  • Silver

High Low Sequin V-Neck Dress

$118.00 $59.00 DQ-8163
In Stock Buy Black Halter Jumpsuit by Jessica Simpson at PromGirl
  • Black

Black Halter Jumpsuit by Jessica Simpson

$128.00 $59.00 JE-JS4R5824
Buy Long V-Neck Open Back La Femme Gown at PromGirl
  • Royal Blue
  • Emerald
  • Marigold
  • Turquoise
  • Chocolate
  • Hot Pink

Long V-Neck Open Back La Femme Gown

$198.00 $59.00 LF-12298
Buy La Femme 12340 Prom Dress at PromGirl
  • Chocolate
  • Black
  • Copper
  • Purple
  • Royal
  • Turquoise

La Femme 12340 Prom Dress

$298.00 $59.00 LF-12340
In Stock Buy Floor Length Spaghetti Strap Dress at PromGirl
  • Black/Ivory

Floor Length Spaghetti Strap Dress

$119.00 $59.00 SI-11470
In Stock Buy Lace Floor Length Strapless Sweetheart Dress at PromGirl
  • Eggplant
  • Navy
  • Champagne
  • Fuchsia
  • Royal

Long Strapless Lace Dress

$129.00 $64.00 DI-K0347B
In Stock Buy Floor Length One Shoulder Dress at PromGirl
  • Royal

Long One Shoulder Dress

$129.00 $64.00 DI-15380
In Stock Buy Floor Length Hot Pink Prom Dress at PromGirl
  • Hot Pink

Floor Length Hot Pink Prom Dress

$199.00 $69.00 HL-211s67400
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Bright Cherry

Strapless Sweetheart Floor Length Dress

$149.00 $69.00 CT-9560QX8A
In Stock Buy High Low Sleeveless Dress at PromGirl
  • Jade
  • Black/Peach

High Low Sleeveless Dress

$69.00 DI-DH1005
In Stock Buy Ruched One Shoulder Floor Length Dress at PromGirl
  • Platinum

Ruched One Shoulder Floor Length Dress

$148.00 $69.00 HOW-PM-22377
In Stock Buy Sleeveless Floor Length Lace Dress at PromGirl
  • Blush

Sleeveless Floor Length Lace Dress

$149.00 $74.00 JU-47631
In Stock Buy Floor Length Strapless Dress with Embellished Waist at PromGirl
  • Ivory
  • Neon Hot Coral

Strapless Prom Gown by City Triangles

$149.00 $74.00 CT-8420DW3B
In Stock Buy Floor Length Strapless Print Dress at PromGirl
  • Blue/White

Floor Length Strapless Print Dress

$149.00 $74.00 JU-47614
In Stock Buy Floor Length Sleeveless Dress at PromGirl
  • Neon Hot Coral

Floor Length Sleeveless Dress

$149.00 $74.00 CT-8415QV1B
In Stock Buy Floor Length Open Back Ivory Gown at PromGirl
  • Ivory/Gold

Floor Length Open Back Ivory Gown

$149.00 $74.00 MO-12020
In Stock Buy Jasz Floor Length Prom Dress at PromGirl
  • White
  • Sky Blue

Jasz Floor Length Prom Dress

$149.00 $74.00 JZ-5032
In Stock Buy Long Strapless Sweetheart Prom Dress at PromGirl
  • Ivory
  • Neon Hot Coral

Strapless Orange Gown by City Triangles

$149.00 $74.00 CT-8420DW3Bnc
In Stock Buy Taffeta Halter Bridesmaid Dress at PromGirl
  • Pewter

Taffeta Halter Bridesmaid Dress

$148.00 $74.00 HOW-PM-22523
In Stock Buy Sleeveless Floor Length V-Neck Dress at PromGirl
  • Jade

Sleeveless Floor Length V-Neck Dress

$149.00 $74.00 SS-X30281J34
In Stock Buy V-Neck Jumpsuit with Long Sleeves at PromGirl
  • Black

V-Neck Jumpsuit with Long Sleeves

$150.00 $75.00 BA-A15786
Buy Sleeveless Floor Length La Femme Prom Dress at PromGirl
  • Hot Pink

Shimmering Evening Gown by La Femme 14425

$298.00 $78.00 LF-GI-14425
In Stock Buy Sleeveless Floor Length V-Neck Dress at PromGirl
  • Coral

Sleeveless Floor Length V-Neck Dress

$199.00 $79.00 MY-2301SJ1S
In Stock Buy Sleeveless V-Neck Floor Length Dress at PromGirl
  • Navy/Indigo

Sleeveless V-Neck Floor Length Dress

$199.00 $79.00 BN-55119
In Stock Buy Floor Length Sleeveless Sweetheart Dress at PromGirl
  • Purple
  • Teal

Floor Length Sleeveless Sweetheart Dress

$168.00 $79.00 HOW-PM-22453
In Stock Buy Sleeveless Popover Jumpsuit at PromGirl
  • Black/Ivory

Sleeveless Popover Jumpsuit

$79.00 SG-AWIFS28
In Stock Buy Floor Length Lace Cap Sleeve Dress at PromGirl
  • Peach
  • Red

Floor Length Lace Cap Sleeve Dress

$159.00 $79.00 DQ-8713
In Stock Buy Cap Sleeve Floor Length Lace Dress at PromGirl
  • Peach
  • Blue

Long Cap Sleeve Lace Dress by Morgan

$249.00 $80.00 MO-11809
In Stock Buy Long V-Neck Dress at PromGirl
  • Purple
  • Dark Silver
  • Perry Blue
  • Teal

Long V-Neck Gown for Prom

$169.00 $84.00 DQ-8257
In Stock Buy Floor Length Sleeveless Black V-Neck Dress at PromGirl
  • Black

Long Sleeveless Black Gown

$89.00 EM-CHM-1003-001
In Stock Buy Floor Length Spaghetti Strap Dress at PromGirl
  • Midnight

Floor Length Spaghetti Strap Dress

$188.00 $89.00 HOW-PM-22659
In Stock Buy Sleeveless Floor Length Floral Print Dress at PromGirl
  • Ivory Multi

Sleeveless Floor Length Floral Print Dress

$199.00 $89.00 HL-231m66250
In Stock Buy Long Strapless Bridesmaid Gown at PromGirl
  • Pewter

Long Strapless Bridesmaid Gown

$180.00 $90.00 HOW-PM-22529
In Stock Buy Full Length Strapless Formal Gown at PromGirl
  • Gold
  • Black
  • Purple
  • Fuchsia
  • Turquoise
  • Lime

Full Length Strapless Formal Gown

$189.00 $94.00 DQ-8116
In Stock Buy Long Ombre One Shoulder Gown at PromGirl
  • Spicy Red
  • Yellow
  • Majestic Purple
  • Turquoise

Long Ombre One Shoulder Gown

$398.00 $98.00 LF-18398
Buy La Femme Prom Dress 12262 at PromGirl
  • Coral
  • Yellow

La Femme Satin Prom Dress

$358.00 $98.00 LF-12262
Buy Strapless Rouched Dress by Gigi at PromGirl
  • Olive

Strapless Rouched Dress by Gigi

$378.00 $98.00 LF-GI-16333
Buy Long V-Neck Print Gown by La Femme at PromGirl
  • Pink

Long V-Neck Print Gown by La Femme

$338.00 $98.00 LF-14441
* 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.