Thordur Fridjonsson (2 January 1952 – 8 February 2011) was an Icelandic economist and institutional leader.
Thordur Fridjonsson was chief executive of the NASDAQ OMX Iceland from 2002. Previous positions included being the General Director of the National Economic Institute from 1987 and Secretary General of the Ministry of Industry and Commerce (1998–1999). On Iceland’s behalf, Fridjonsson was a member of the Economic Policy Committee at OECD, an Alternate Governor at IMF and EBRD and Chairman of the Nordic Project Fund. Prior to this he was an economic advisor to Prime Minister's Gunnar Thoroddsen (1980–1983) and Steingrimur Hermannsson (1983–1986), lecturer at the Economic Department of the University of Iceland (1982–1987) and economist to the Association of Icelandic Manufacturers (Félag íslenskra iðnrekenda) (1978–1980).
Fridjonsson contributed articles on a range of contemporary economic issues in Iceland and edited The Icelandic economy explained (Íslensk haglýsing), 1986, AB, Reykjavík.
- "Þórður Friðjónsson has died (in Icelandic)". Morgunblaðið. 9 February 2011. Retrieved 9 February 2011.
- Timmons, Heather (18 April 2006). "Iceland's Fizzy Economy Faces a Test". New York Times. Retrieved 17 December 2010.
- "Image library". Nasdaq OMX. Retrieved 17 December 2010.
- Passell, Peter (26 June 1994). "Ideas & Trends; A Little Economy That Can". New York Times. Retrieved 17 December 2010.
- Viðskipta og hagfræðingatal III, Þjóðsaga, 1997 (in Icelandic).