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 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 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 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 Strapless Floor Length Prom Dress at PromGirl
  • Aqua

Strapless Floor Length Prom Dress

$109.00 $49.00 PO-7164
In Stock Buy Floor Length Halter Dress at PromGirl

Floor Length Halter Dress

$98.00 $49.00 MF-E1168
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
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
  • Teal

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 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
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 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
  • Burgundy
  • Teal
  • Navy

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
Buy La Femme 14303 Prom Dress at PromGirl
  • Chocolate

Backless Halter Gown by La Femme 14303

$238.00 $98.00 LF-GI-14303
Buy La Femme 14660 Dress at PromGirl
  • Apple Green
  • Fuchsia
  • Lavender
  • White

Elegant Evening Dress by La Femme 14660

$198.00 $98.00 LF-GI-14660
In Stock Buy Strapless Formal Dress at PromGirl
  • Black
  • Burgundy
  • Royal
  • Plum
  • White
  • Gold
  • Olive

Long Formal Gown 29283

$99.00 SF-29283
In Stock Buy Elegant Strapless Formal Gown at PromGirl
  • Gold
  • Purple
  • Brown(Chocolate)
  • Black

Strapless Formal Gown for Prom

$199.00 $99.00 DQ-8072
In Stock Buy Floor Length Halter Dress at PromGirl
  • Royal/Silver

Floor Length Halter Dress

$199.00 $99.00 BN-55239
In Stock Buy Long One Shoulder Dress at PromGirl
  • Black
  • Plum
  • Brown

One Shoulder Prom Gown

$99.00 DQ-8324
In Stock Buy One Shoulder Formal Dress at PromGirl
  • Purple
  • Fuchsia
  • Navy

One Shoulder Backless Evening Gown

$199.00 $99.00 DQ-8079
In Stock Buy Floor Length Halter Prom Dress at PromGirl
  • Blush

Open Back Halter Prom Gown

$99.00 MY-6644SJ1S
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Mint

Long Mint Strapless Prom Dress

$199.00 $99.00 DQ-8633
In Stock Buy Spaghetti Strap Floor Length Dress at PromGirl
  • Black/Nude/Silver

Spaghetti Strap Floor Length Dress

$199.00 $99.00 BN-55008
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • Cream/Blush/Silver

Strapless Sweetheart Floor Length Dress

$199.00 $99.00 CT-8012RW5B
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 Floor Length Open Back Formal Dress at PromGirl
  • Purple

Floor Length Open Back Formal Dress

$199.00 $99.00 DQ-9007
In Stock Buy Sleevless Floor Length Black Dress at PromGirl
  • Black

Sleeveless Long Black Dress

$99.00 MY-2352it1S
Buy Long V-Neck Print Dress by La Femme at PromGirl
  • Multi

Long V-Neck Print Dress by La Femme

$338.00 $99.00 LF-DWTS-15689
Buy Long Strapless Sweetheart Prom Dress by La Femme at PromGirl
  • Turquoise

Strapless Prom Dress by La Femme 14574

$250.00 $99.00 LF-GI-14574
In Stock Buy Strapless Sweetheart La Femme Dress at PromGirl
  • Yellow

Strapless Sweetheart La Femme Dress

$478.00 $99.00 LF-17499
Buy Long Ruched Strapless Mermaid Gown at PromGirl
  • Red/Nude

Long Ruched Strapless Mermaid Gown

$450.00 $99.00 LF-18282
Buy Long Strapless Tulle Mermaid Gown at PromGirl
  • Blue/Nude
  • Black/Nude

Long Strapless Tulle Mermaid Gown

$398.00 $99.00 LF-18372
Buy Floor Length V-Neck La Femme Dress at PromGirl
  • Purple Mist

Floor Length V-Neck La Femme Dress

$250.00 $99.00 LF-17503
In Stock Buy One Shoulder La Femme Prom Dress at PromGirl
  • Sapphire Blue

One Shoulder La Femme Prom Dress

$338.00 $99.00 LF-17525
In Stock Buy Sleeveless Sequin Prom Dress at PromGirl
  • Peach

Sleeveless Sequin Prom Dress

$199.00 $99.00 FB-GL2014
In Stock Buy Long Prom Dress with Beaded Top  at PromGirl
  • Black

Long Prom Dress with Beaded Top

$198.00 $99.00 FB-GL2040
Buy Elegant Strapless Formal Gown at PromGirl
  • Gold
  • Purple
  • Brown(Chocolate)
  • Black

Strapless Brown Formal Gown

$199.00 $99.00 DQ-8072br
Buy Burgundy Formal Gown at PromGirl
  • Black
  • Burgundy
  • Royal
  • Plum
  • White
  • Gold
  • Olive

Burgundy Formal Gown

$99.00 SF-29283b
In Stock Buy Long Strapless Sweetheart Formal Gown at PromGirl
  • Morganite
  • 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

Strapless Formal Gown by Alyce 35442

$230.00 $99.00 AL-35442
In Stock Buy Long Strapless Sweetheart Evening Gown at PromGirl
  • Electric Pink

Strapless Beaded Gown by Flirt

$278.00 $99.00 FL-P5830
In Stock Buy Floor Length Lace V-Neck Dress at PromGirl
  • Mint

Floor Length Lace V-Neck Dress

$149.00 $99.00 CT-3308QL2B
In Stock Buy Long Classic Chiffon Prom Dress at PromGirl
  • Coral

Long Classic Chiffon Prom Dress

$199.00 $99.00 FB-GL2075
In Stock Buy Floor Length Sleeveless Dress at PromGirl
  • Teal

Floor Length Sleeveless Dress

$220.00 $105.00 HOW-PM-22655
In Stock Buy Spaghetti Strap Cut Out Prom Dress at PromGirl
  • Seafoam

Spaghetti Strap Cut Out Prom Dress

$229.00 $114.00 HL-211s50500
In Stock Buy Floor Length Sweetheart Lace Dress at PromGirl
  • Navy
  • Coral
  • Beige

Floor Length Sweetheart Lace Dress

$229.00 $114.00 DQ-8888
In Stock Buy Floor Length Strapless Sweetheart Atria Dress at PromGirl
  • Royal Blue

Long Strapless Atria Prom Dress 2311

$230.00 $115.00 AT-2311
In Stock Buy One Shoulder Evening Gown at PromGirl
  • Seafoam

One Shoulder Evening Gown

$230.00 $115.00 SSD-3003
Buy Long Open Back Sweetheart Print Gown at PromGirl
  • Multi

Long Open Back Sweetheart Print Gown

$398.00 $118.00 LF-18436
In Stock Buy Floor Length V-neck La Femme Prom Dress at PromGirl
  • Electric Purple/Gold
  • Pink/Gold

Low Cut Evening Gown by La Femme

$398.00 $118.00 LF-16288
* 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.