He was also convicted on one count of failing to disclose foreign bank accounts, and two bank fraud charges.
The jury reached a verdict on eight of 18 charges, but failed to do so on the remaining 10 and the judge declared a mistrial on those.
It was first criminal trial stemming from the justice department inquiry into alleged Russian election meddling.
The verdict came on the fourth day of jury deliberations following a trial that saw 10 days of testimony.
What happened during the trial?
Prosecutors presented evidence of Mr Manafort's luxurious lifestyle - including photos of a $15,000 (£11,000) ostrich coat.
Judge Ellis scolded the prosecution for spending too much time on Mr Manafort's wealth, saying it "isn't a crime to have a lot of money".
But prosecutors had emphasised Mr Manafort's extravagant spending was only possible because of his bank and tax fraud.