| Birth Date: | 12 July 1927 |
| Birth Place: | Helsinki, Finland |
| Death Date: | 26 March 2011 (aged 83) |
| Death Place: | Helsinki, Finland |
| Height: | 174 cm |
| Weight: | 72–74 kg |
| Sport: | Canoe racing |
| Club: | Merimelojat, Helsinki |
| Show-Medals: | yes |
Yrjö Jalmari "Yka" Hietanen (12 July 1927 – 26 March 2011) was a Finnish canoe sprinter who competed at the 1952 and 1956 Olympics. In 1952 he won two gold medals with Kurt Wires in the 1000 m and 10000 m events. In 1956 he placed seventh over 10000 m.