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 Floor Length Spaghetti Strap Dress at PromGirl
  • Black

Floor Length Spaghetti Strap Dress

$49.00 $29.00 JU-47244
In Stock Buy Strapless Print Pantsuit at PromGirl
  • Ivory

Strapless Print Pantsuit

$39.00 TR-P50047
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 One Shoulder Floor Length Dress at PromGirl
  • Ivory

One Shoulder Floor Length Dress

$149.00 $49.00 MY-3725SK1N
In Stock Buy One Shoulder Floor Length Dress at PromGirl
  • Royal Blue
  • Watermelon
  • Banana

One Shoulder Prom Gown by Ruby Rox

$99.00 $49.00 RR-CGX2207i
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 High Neck Prom Dress at PromGirl
  • Black
  • Beige
  • Coral
  • Teal

Floor Length High Neck Prom Dress

$99.00 $49.00 LP-22849
In Stock Buy Classic Long Strapless Sweetheart Gown at PromGirl
  • Plum
  • Royal

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 One Shoulder Dress at PromGirl
  • Gunmetal

Floor Length One Shoulder Dress

$149.00 $59.00 MQ-808888
In Stock Buy Neon Coral Jumpsuit at PromGirl
  • Neon Coral

Neon Coral Jumpsuit

$59.00 AC-NJ72661B
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 Elegant Halter Gown at PromGirl
  • Dark Coral

Halter Prom Gown

$110.00 $59.00 BD-DYO67007
In Stock Buy Lace Floor Length Strapless Sweetheart Dress at PromGirl
  • Eggplant
  • Champagne
  • Navy
  • Fuchsia
  • Royal

Long Strapless Lace Dress

$129.00 $64.00 DI-K0347B
In Stock Buy Long Blue Dress by XOXO at PromGirl
  • Blue

Long Blue Prom Dress by XOXO

$129.00 $64.00 XO-2133SSK1
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 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
  • Navy

Strapless Prom Gown by City Triangles

$149.00 $74.00 CT-8420DW3B
In Stock Buy Floor Length Open Back Lace Gown at PromGirl
  • Coral

Floor Length Open Back Lace Gown

$149.00 $74.00 JU-47705
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 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 Taffeta Halter Bridesmaid Dress at PromGirl
  • Pewter

Taffeta Halter Bridesmaid Dress

$148.00 $74.00 HOW-PM-22523
Buy Floor Length Strapless Prom Dress at PromGirl
  • Ivory
  • Neon Hot Coral
  • Navy

Strapless Ivory Gown by City Triangles

$149.00 $74.00 CT-8420DW3Bw
Buy Long Strapless Sweetheart Prom Dress at PromGirl
  • Ivory
  • Neon Hot Coral
  • Navy

Strapless Orange Gown by City Triangles

$149.00 $74.00 CT-8420DW3Bnc
In Stock Buy Strapless Sweetheart Floor Length Dress at PromGirl
  • White
  • Royal

Beaded Strapless Prom Dress

$149.00 $75.00 BD-067A104
Buy Floor Length Strapless Dress at PromGirl
  • White
  • Royal

Beaded Strapless Long White Dress

$149.00 $75.00 BD-067A104w
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 Black Halter Pantsuit by XOXO at PromGirl
  • Black

Black Halter Pantsuit by XOXO

$79.00 XO-9197MLR8
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 Strapless Bridesmaid Gown at PromGirl
  • Pewter

Long Strapless Bridesmaid Gown

$180.00 $90.00 HOW-PM-22529
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 Long One Shoulder Print Gown at PromGirl
  • Purple/Multi

Long One Shoulder Print Gown

$338.00 $98.00 LF-17049
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 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
  • Olive
  • Gold
  • White

Long Formal Gown 29283

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

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 Floor Length Hot Pink Prom Dress at PromGirl
  • Hot Pink

Floor Length Hot Pink Prom Dress

$199.00 $99.00 HL-211s67400
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 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 Floor Length Sleeveless Dress at PromGirl
  • Black

Floor Length Sleeveless Dress

$99.00 DI-DD177-0807
In Stock Buy High Low Halter Dress at PromGirl
  • Coral
  • Black
  • Mint
  • Turquoise
  • Purple

High Low Halter Dress

$99.00 DQ-8581
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
Buy Long Strapless Tulle Mermaid Gown at PromGirl
  • Blue/Nude
  • Black/Nude

Long Strapless Tulle Mermaid Gown

$398.00 $99.00 LF-18372
In Stock Buy One Shoulder La Femme Prom Dress at PromGirl
  • Electric Purple
  • Sapphire Blue

One Shoulder La Femme Prom Dress

$338.00 $99.00 LF-17525
Buy Elegant Strapless Formal Gown at PromGirl
  • Gold
  • Red
  • Purple
  • Brown(Chocolate)
  • Teal
  • Green
  • Ivory

Strapless Brown Formal Gown

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

Burgundy Formal Gown

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

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

Strapless Formal Gown by Alyce 35442

$230.00 $99.00 AL-35442
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 Print Dress at PromGirl
  • Fuchsia

Strapless Print Prom Dress

$219.00 $99.00 DQ-8088
In Stock Buy Floor Length Strapless Sweetheart Atria Dress at PromGirl
  • Royal Blue
  • Plum

Long Strapless Atria Prom Dress 2311

$230.00 $115.00 AT-2311
Buy Long V-Neck Evening Gown at PromGirl
  • Nude
  • Purple Mist

Long V-Neck Evening Gown

$398.00 $118.00 LF-17019
In Stock Buy Long Strapless Sequin Dress at PromGirl
  • Royal Blue/Silver

Long Strapless Sequin Dress

$398.00 $118.00 LF-17915
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
In Stock Buy Floor Length Off the Shoulder Dress at PromGirl
  • Black

Floor Length Off the Shoulder Dress

$238.00 $119.00 TE-3000
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 Sleeveless V-Neck Dress at PromGirl
  • Lavender
  • Dusty Pink
  • Teal
  • Silver

Sleeveless V-Neck Long Prom Dress

$249.00 $124.00 SI-16111
In Stock Buy Floor Length Jewel Embellished Dress at PromGirl
  • Black

Floor Length Jewel Embellished Dress

$249.00 $124.00 X-XS5344
In Stock Buy Sleeveless Sequin Floor Length Dress at PromGirl
  • Antique Gold

Sleeveless Sequin Floor Length Dress

$249.00 $124.00 IT-3058
In Stock Buy Floor Length Off the Shoulder Dress at PromGirl
  • Green

Floor Length Off the Shoulder Dress

$249.00 $124.00 SSD-3110
Buy Floor Length Sleeveless V-Neck Dress at PromGirl
  • Lavender
  • Dusty Pink
  • Teal
  • Silver

Sleeveless V-Neck Long Pink Prom Gown

$249.00 $124.00 SI-16111p
Buy Floor Length Sleeveless V-Neck Dress at PromGirl
  • Lavender
  • Dusty Pink
  • Teal
  • Silver

Sleeveless Teal Blue Long Prom Dress

$249.00 $124.00 SI-16111t
In Stock Buy High Neck Long Prom Dress at PromGirl
  • Navy

High Neck Long Prom Dress

$129.00 BA-A15619C
* 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.