The 19th IEEE Symposium on Computer Arithmetic will be held in Portland, Oregon, USA in summer 2009. The event will open at 9am on Monday June 8th with an invited keynote talk by Dr. David Shaw, founder and Chief Scientist of D. E. Shaw Research. The main part of the symposium will consist of peer-reviewed technical presentations on all aspects of computer arithmetic. The scientific program will conclude at midday on Wednesday June 10th, followed by a lunch cruise on the Willamette River.