Aki Seitsonen (born February 5, 1986 in Riihimäki, Finland) is a Finnish professional hockey centre.
He played junior hockey for the Prince Albert Raiders from 2003 to 2006. Seitsonen was drafted 118th overall by the Calgary Flames in the 2004 NHL Entry Draft.
Seitsonen turned pro in 2006-07 with the Las Vegas Wranglers and the Omaha Ak-Sar-Ben Knights. In 2007-08 he played the entire season with the Wranglers and in 2008-09 played for the Quad City Flames. Seitsonen returned to his native Finland in 2009 to play for HPK Hämeenlinna and Lukko Rauma.
He played for the Idaho Steelheads of the ECHL in 2010-11.