These are the Billboards National Disco Action Top 40 number-one singles of 1978.
{| class="wikitable" style="text-align: center;"
!Issue date
!Song
!Artist
|-
|January 7
|rowspan="2"|Once Upon a Time... (all cuts)
|rowspan="2"|Donna Summer
|-
|January 14
|-
|January 21
|rowspan="4"|"Supernature"/<br>"Give Me Love"/<br>"Love Is Here"
|rowspan="4"|Cerrone
|-
|January 28
|-
|February 4
|-
|February 11
|-
|February 18
|"Let's All Chant"/<br>"Love Express"
|Michael Zager Band
|-
|February 25
|rowspan="3"|"Dance Little Dreamer"/<br>"Risky Changes"
|rowspan="3"|Bionic Boogie
|-
|March 4
|-
|March 11
|-
|March 18
|"Romeo and Juliet"
|Alec R. Costandinos & the Syncophonic Orchestra
|-
|March 25
|rowspan="2"|Come into My Heart (all cuts)
|rowspan="2"|USA European Connection
|-
|April 1
|-
|April 8
|rowspan="3"|Voyage (all cuts)
|rowspan="3"|Voyage
|-
|April 15
|-
|April 22
|-
|April 29
|rowspan="5"|"If My Friends Could See Me Now"/<br>"Gypsy Lady"/<br>"Runaway Love"
|rowspan="5"|Linda Clifford
|-
|May 6
|-
|May 13
|-
|May 20
|-
|May 27
|-
|June 3
|rowspan="6"|"Last Dance"/<br>"After Dark"/<br>"Thank God It's Friday"/<br>"Take It to the Zoo"
|rowspan="6"|Donna Summer/<br>Pattie Brooks/<br>Love & Kisses/<br>Sunshine
|-
|June 10
|-
|June 17
|-
|June 24
|-
|July 1
|-
|July 8
|-
|July 15
|rowspan="3"|"Boogie Oogie Oogie"
|rowspan="3"|A Taste of Honey
|-
|July 22
|-
|July 29
|-
|August 5
|rowspan="2"|"Hot Shot"
|rowspan="2"|Karen Young
|-
|August 12
|-
|August 19
|rowspan="6"|"Dance (Disco Heat)"/<br>"You Make Me Feel (Mighty Real)"
|rowspan="6"|Sylvester
|-
|August 26
|-
|September 2
|-
|September 9
|-
|September 16
|-
|September 23
|-
|September 30
|rowspan="2"|"Keep on Jumpin'"/<br>"In the Bush"
|rowspan="2"|Musique
|-
|October 7
|-
|October 14
|Instant Replay (all cuts)
|Dan Hartman
|-
|October 21
|rowspan="5"|"MacArthur Park Suite"
|rowspan="5"|Donna Summer
|-
|October 28
|-
|November 4
|-
|November 11
|-
|November 18
|-
|November 25
|rowspan="6"|"Le Freak"/<br>"I Want Your Love"/<br>"Chic Cheer"
|rowspan="6"|Chic
|-
|December 2
|-
|December 9
|-
|December 16
|-
|December 23
|-
|December 30
|-
|}
See also
- 1978 in music
- List of number-one dance hits (United States)
- List of artists who reached number one on the U.S. Dance chart
References
- Some weeks may also be found at Billboard magazine courtesy of Google Books: 1975—1979.