| Harald Lyngsaa | |
| Fullname: | Harald Christian Lyngsaa |
| Birth Date: | 22 October 1917 |
| Birth Place: | Copenhagen, Denmark |
| Position: | Midfielder |
| Years1: | 1936–1941 |
| Clubs1: | Kjøbenhavns Boldklub |
| Years2: | 1936–1941 |
| Clubs2: | B.93 |
| Years3: | 1936–1941 |
| Clubs3: | Kjøbenhavns Boldklub |
| Nationalyears1: | 1945–1946 |
| Nationalteam1: | Denmark U21 |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 1 |
| Nationalyears2: | 1940–1950 |
| Nationalteam2: | Denmark |
| Nationalcaps2: | 14 |
| Nationalgoals2: | 2 |
Harald Christian Lyngsaa (22 October 1917 - 9 December 1982) was a Danish footballer who played as a midfielder for Kjøbenhavns Boldklub and B.93.[1] He made 14 appearances for the Denmark national team from 1940 to 1950.[2]