Kristjan Rahnu

{{short description|Estonian decathlete}}

{{Infobox athlete

| name = Kristjan Rahnu

| image =

| caption =

| birth_date = {{birth date and age|df=yes|1979|08|29}}

| birth_place = Kohila, Estonia

| death_date =

| death_place =

| height = {{convert|189|cm|abbr=on}}

| weight = {{convert|82|kg|abbr=on}}

| country = {{EST}}

| sport = Athletics

| event = Decathlon

| pb = Decathlon: 8526
Heptathlon: 6062

| career =

}}

Kristjan Rahnu (born 29 August 1979 in Kohila) is a retired Estonian decathlete.{{cite web|url=http://www.decathlon2000.ee/eng/athletes.php?art=619|title=Kristjan Rahnu|date=2009-06-04|publisher=Decathlon2000|accessdate=30 July 2010|archive-url=https://web.archive.org/web/20081231122923/http://www.decathlon2000.ee/eng/athletes.php?art=619|archive-date=31 December 2008|url-status=dead}} His personal best dates back to 2005 when he did 8526 points in France, Arles on June 4–5. After many injuries and other issues, Rahnu is trying to make a successful return to the sport in 2009 for the first time since the European World Championships in 2006.