John Phillip Marttila (October 18, 1940 – November 3, 2018) was a leading Democratic strategist and political consultant who has advised politicians and elected officials, including Vice President Joe Biden, and Senator John Kerry.
He has served as a consultant for various domestic ballot initiatives and has worked overseas for campaigns in Russia, Israel, Hungary and Greece.
He is president of Marttila Strategies, a research firm based in Washington, DC and Boston.