Denmark competed at the 1988 Summer Olympics in Seoul, South Korea. 78 competitors, 57 men and 21 women, took part in 73 events in 15 sports.
Medalists
{| class="wikitable sortable" style="font-size:90%"
|-
!Medal
!Name
!Sport
!Event
!Date
|-
| || || Cycling || Men's points race || 24 September
|-
| || <br> || Sailing || Flying Dutchman || 27 September
|-
| || || Swimming || Men's 200 metre butterfly || 24 September
|-
| || <br><br> || Sailing || Soling || 27 September
|}
Competitors
The following is the list of number of competitors in the Games.
{| class="wikitable sortable" style="text-align:center;"
|-
! width=180|Sport
! width=55|Men
! width=55|Women
! width=55|Total
|-
| align=left|Archery
| 3 || 0 || 3
|-
| align=left|Athletics
| 4 || 1 || 5
|-
| align=left|Boxing
| 5 || – || 5
|-
| align=left|Canoeing
| 2 || 4 || 6
|-
| align=left|Cycling
| 8 || 1 || 9
|-
| align=left|Equestrian
| 2 || 2 || 4
|-
| align=left|Gymnastics
| 0 || 1 || 1
|-
| align=left|Judo
| 1 || – || 1
|-
| align=left|Modern pentathlon
| 1 || – || 1
|-
| align=left|Rowing
| 2 || 1 || 3
|-
| align=left|Sailing
| 11 || 3 || 14
|-
| align=left|Shooting
| 6 || 0 || 6
|-
| align=left|Swimming
| 8 || 7 || 15
|-
| align=left|Tennis
| 2 || 1 || 3
|-
| align=left|Weightlifting
| 2 || – || 2
|-
! Total || 57 || 21 || 78
|}
Archery
After two Olympiads without competing in archery, Denmark returned to the sport in 1988. Three men competed, placing 11th as a team and no higher than 23rd as individuals.
Men's Individual Competition:
- Henrik Toft — 1/8 final (→ 23rd place)
- Jan Jacobsen — Preliminary round (→ 25th place)
- Niels Gammelgaard — Preliminary round (→ 56th place)
Men's Team Competition:
- Toft, Jacobsen, and Gammelgaard — Semifinal (→ 11th place)
Athletics
Men's 1,500 metres
- Mogens Guldberg
Men's Marathon
- Henrik Jørgensen
- Final — 2:16.40 (→ 22nd place)
Men's 110 metres Hurdles
- Erik Jensen
Men's Decathlon
- Lars Warming — 7859 points (→ 19th place)
:# 100 metres — 11.07s
:# Long Jump — 7.04m
:# Shot Put — 13.41m
:# High Jump — 1.94m
:# 400 metres — 47.97s
:# 110m Hurdles — 14.49s
:# Discus Throw — 40.38m
:# Pole Vault — 4.80m
:# Javelin Throw — 51.50m
:# 1.500 metres — 4:22.41s
Women's Long Jump
- Lene Demsitz
Boxing
Men's Flyweight (– 51 kg)
- Johnny Bredahl
- First Round — Lost to Hamed Halbouni (SYR), RSC-2
Men's Light-Welterweight
- Søren Søndergaard
Men's Light-Middleweight
- Johnny de Lima
Men's Light-Heavyweight
- Niels Madsen
Men's Heavyweight
- Claus Børge Nielsen
Canoeing
Cycling
Nine cyclists, eight men and one woman, represented Denmark in 1988. Dan Frost won gold in the points race.
;Men's road race
- Tommy Nielsen
- Peter Meinert Nielsen
;Men's 1 km time trial
- Kenneth Røpke
;Men's individual pursuit
- Peter Clausen
;Men's team pursuit
- Peter Clausen
- Dan Frost
- Jimmi Madsen
- Lars Olsen
- Ken Frost
;Men's points race
- Dan Frost
;Women's road race
- Karina Skibby — 2:00:52 (→ 42nd place)
Equestrianism
Judo
Modern pentathlon
One male pentathlete represented Denmark in 1988.
Men's Individual Competition:
- Tue Hellstem — 4940pts (→ 27th place)
Men's Team Competition:
- Hellstem — 4940pts (→ 21st place)
Rhythmic gymnastics
Rowing
Sailing
;Men
{|class="wikitable" style="font-size:90%"
!rowspan="2"|Athlete
!rowspan="2"|Event
!colspan=7|Race
!rowspan=2|Net points
!rowspan=2|Final rank
|-style="font-size:95%"
!1
!2
!3
!4
!5
!6
!7
|-align=center
|align=left|Lasse Hjortnæs
|align=left|Finn
|1
|<s>RET</s>
|2
|5
|5
|12
|5
|51.0
|5
|-align=center
|align=left|Hans Natorp<br/>Paul Natorp
|align=left|Men's 470
|14
|18
|22
|<s>PMS</s>
|18
|18
|17
|143.0
|21
|}
;Women
{|class="wikitable" style="font-size:90%"
!rowspan="2"|Athlete
!rowspan="2"|Event
!colspan=7|Race
!rowspan=2|Net points
!rowspan=2|Final rank
|-style="font-size:95%"
!1
!2
!3
!4
!5
!6
!7
|-align=center
|align=left|Mette Munch<br/>Lone Sørensen
|align=left|Women's 470
|6
|7
|8
|11
|8
|<s>RET</s>
|RET
|97.7
|14
|}
;Open
{|class="wikitable" style="font-size:90%"
!rowspan="2"|Athlete
!rowspan="2"|Event
!colspan=7|Race
!rowspan=2|Net points
!rowspan=2|Final rank
|-style="font-size:95%"
!1
!2
!3
!4
!5
!6
!7
|-align=center
|align=left|Jørgen Bojsen-Møller<br/>Christian Grønborg
|align=left|Flying Dutchman
|1
|4
|2
|2
|<s>6</s>
|3
|6
|31.4
|16x16px
|-align=center
|align=left|Paul Elvstrøm<br/>Trine Elvstrøm-Myralf
|align=left|Tornado
|16
|14
|<s>RET</s>
|16
|5
|19
|7
|112.0
|15
|-align=center
|align=left|Anders Geert Jensen<br/>Mogens Just
|align=left|Star
|<s>PMS</s>
|10
|10
|9
|8
|2
|5
|74.0
|11
|-align=center
|align=left|Jesper Bank<br/>Jan Mathiasen<br/>Steen Secher
|align=left|Soling
|9
|2
|12
|<s>15</s>
|4
|2
|3
|52.7
|16x16px
|}
Shooting
Swimming
Men's 50m Freestyle
- Vagn Høgholm
- Heat — 23.50 (→ did not advance, 20th place)
- Peter Rohde
- Heat — 23.70 (→ did not advance, 26th place)
Men's 100m Freestyle
- Franz Mortensen
- Heat — 50.74
- B-Final — 51.05 (→ 13th place)
- Peter Rohde
- Heat — 51.38 (→ did not advance, 25th place)
Men's 200m Freestyle
- Franz Mortensen
- Heat — 1:51.15
- B-Final — 1:51.44 (→ 13th place)
- Jan Patvel Larsen
- Heat — 1:53.61 (→ did not advance, 31st place)
Men's 400m Freestyle
- Claus Christensen
- Heat — 4:00.46 (→ did not advance, 31st place)
Men's 100m Backstroke
- Lars Sørensen
- Heat — 58.01 (→ did not advance, 21st place)
Men's 200m Backstroke
- Lars Sørensen
- Heat — 2:05.73 (→ did not advance, 26th place)
Men's 100m Breaststroke
- Lars Sørensen
- Heat — 1:06.30 (→ did not advance, 47th place)
Men's 200m Breaststroke
- Christian Toft
- Heat — DSQ (→ did not advance, no ranking)
Men's 100m Butterfly
- Benny Nielsen
- Heat — 54.52
- B-Final — 54.77 (→ 11th place)
Men's 200m Butterfly
- Benny Nielsen
- Heat — 1:59.26
- Final — 1:58.24 (→ 16x16px Silver Medal)
- Jan Patvel Larsen
- Heat — 2:03.01 (→ did not advance, 23rd place)
Men's 4 × 100 m Freestyle Relay
- Franz Mortensen, Vagn Høgholm, Benny Nielsen, and Peter Rohde
- Heat — 3:25.15 (→ did not advance, 10th place)
Men's 4 × 200 m Freestyle Relay
- Franz Mortensen, Claus Christensen, Jan Patvel Larsen, and Peter Rohde
- Heat — 7:33.31 (→ did not advance, 11th place)
Men's 4 × 100 m Medley Relay
- Lars Sørensen, Christian Toft, Benny Nielsen, and Franz Mortensen
- Heat — 3:51.97 (→ did not advance, 14th place)
<br>
Women's 50m Freestyle
- Gitta Jensen
- Heat — 26.61 (→ did not advance, 20th place)
Women's 100m Freestyle
- Gitta Jensen
- Heat — 57.28 (→ did not advance, 20th place)
- B-Final — 57.02 (→ 13th place)
- Pia Sørensen
- Heat — 57.82 (→ did not advance, 26th place)
Women's 200m Freestyle
- Mette Jacobsen
- Heat — 2:01.80
- B-Final — 2:01.84 (→ 11th place)
- Annette Jørgensen
- Heat — 2:04.71 (→ did not advance, 24th place)
Women's 400m Freestyle
- Eva Mortensen
- Heat — 4:18.06 (→ did not advance, 20th place)
- Pernille Jensen
- Heat — 4:20.96 (→ did not advance, 26th place)
Women's 800m Freestyle
- Pernille Jensen
- Heat — 8:50.82 (→ did not advance, 18th place)
- Eva Mortensen
- Heat — 8:53.67 (→ did not advance, 22nd place)
Women's 200m Breaststroke
- Pia Sørensen
- Heat — 2:38.49 (→ did not advance, 25th place)
Women's 200m Butterfly
- Mette Jacobsen
- Heat — 2:15.78
- B-Final — 2:15.60 (→ 13th place)
Women's 200m Individual Medley
- Annette Poulsen
- Heat — 2:21.83 (→ did not advance, 20th place)
Women's 400m Individual Medley
- Annette Poulsen
- Heat — 4:54.01
- B-Final — 4:54.40 (→ 15th place)
Women's 4 × 100 m Freestyle Relay
- Mette Jacobsen, Gitta Jensen, Pia Sørensen, and Annette Jørgensen
- Heat — 3:48.83
- Gitta Jensen, Pia Sørensen, Mette Jacobsen, and Annette Jørgensen
- Final — 3:49.25 (→ 8th place)
Women's 4 × 100 m Medley Relay
- Mette Jacobsen, Pia Sørensen, Annette Jørgensen, and Gitta Jensen
- Heat — DSQ (→ did not advance, no ranking)
Tennis
Women's Singles Competition
- Tine Scheuer-Larsen
- First Round — Defeated Warda Bouchabou (Algeria) 6–0, 6–1
- Second Round — Defeated Wendy Turnbull (Australia) 6–4, 6–3
- Third Round — Lost to Natasha Zvereva (Soviet Union) 1–6, 2–6