| Lea Alaerts | |
| Nationality: | Belgian |
| Sport: | Sprinting |
| Event: | 100 metres |
| Birth Date: | 6 April 1954 |
| Birth Place: | Leuven, Belgium |
Lea Alaerts (born 6 April 1954) is a Belgian sprinter. She competed in the women's 100 metres at the 1976 Summer Olympics.[1] She and her teammates, Regine Berg, Anne Michel and Rosine Wallez set the Belgian record in the 4 × 400 metres relay at the 1980 Summer Olympics in Moscow with a time of 3:30.7.[2]