11 March 1988|
|Height||6 ft 2 in (188 cm)|
|Weight||194 lb (88 kg; 13 st 12 lb)|
170th overall, 2007|
Ilvonen made his first appearances for Tappara during the 2006–07 season. After a promising rookie year, he was selected by the Minnesota Wild in the sixth-round, 170th overall, in the 2007 NHL Entry Draft. In the spring of 2008 he had a brief stint with HPK before returning to Tappara for the next season.
Ilvonen was never signed by the Wild and remained in Finland for the entirety of his professional career, finishing with the Espoo Blues in the 2012–13 season. Having ended his career playing in 204 Liiga games, Ilvonen later returned to Tappara in a coaching capacity, accepting an assistant coaching role with their under-18 youth team from the 2015–16 season.
- Harri Ilvonen career statistics at The Internet Hockey Database
- Harri Ilvonen career statistics at EliteProspects.com
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