- Sport: hockey
- Team: Atlanta Thrashers
- Position: goaltender
- Nationality: Finland

- Birth date: 1983-11-16 (25 years)
- Place of birth: Helsinki, Finland
- Nickname: "Kärppä"
Kari Lehtonen is the starting goaltender for the Atlanta Thrashers. He was drafted 2nd overall in 2002 after being awarded the Finnish SM-liiga MVP in the playoffs while playing for Jokerit.
Lehtonen holds the following Thrasher records by goaltender:
- most victories
- most games played
- most games played in a single season
- most shutouts
- most saves in a single season
- most starts in a single season
- most minutes played in a single season
Personal awards:
- Best SM-liiga goaltender 2002 and 2003
- Jari Kurri trophy best player during SM-liiga playoffs 2002
- Best goaltender in the World Championships 2007 (Finland won the Silver Medal)

Lehtonen holds the following Thrasher records by goaltender:
- most victories
- most games played
- most games played in a single season
- most shutouts
- most saves in a single season
- most starts in a single season
- most minutes played in a single season
Personal awards:
- Best SM-liiga goaltender 2002 and 2003
- Jari Kurri trophy best player during SM-liiga playoffs 2002
- Best goaltender in the World Championships 2007 (Finland won the Silver Medal)

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