| Birth Date: | 1983 3, df=yes |
| Birth Place: | Helsinki, Finland |
| Height Ft: | 6 |
| Height In: | 0 |
| Weight Lb: | 192 |
| Position: | Goaltender |
| Catches: | Left |
| Played For: | HC TPS Ässät Djurgårdens IF HPK Metallurg Novokuznetsk Barys Astana Avangard Omsk Växjö Lakers Tappara HC '05 Banská Bystrica Orli Znojmo |
| Ntl Team: | FIN |
| Draft: | 117th overall |
| Draft Year: | 2003 |
| Draft Team: | Nashville Predators |
| Career Start: | 2002 |
| Career End: | 2020 |
Teemu Lassila (born 26 March 1983) is a Finnish former professional ice hockey goaltender. He most recently played in the 2019–20 season of the Austrian Hockey League (EBEL) with the Czech team Orli Znojmo. He appeared in three games at the 2011 IIHF World Championship as a member of the gold medal-winning Finland men's national ice hockey team.
Lassila was selected by the Nashville Predators in the 4th round (117th overall) of the 2003 NHL Entry Draft, but he never played in the National Hockey League.