Highest inflation rate by country in 2019. The highest inflation rate in 2019 was reported in Venezuela, followed by Zimbabwe, South Sudan, Sudan, Argentina, Liberia, Iran and Ethiopia, Haiti and Angola. The lowest inflation rate in 2019 was reported by Libya, Burkina Faso, Chad, Mali, Niger, United Arab Emirates, Iraq, Fiji and Qatar. This is a list of cities and states sorted by the CIA-based inflation rate. Inflation rate is defined as the annual percent change in consumer prices compared with the previous year's consumer prices.. The list is based on the CIA World Factbook data unless otherwise indicated, and is updated according to the statistical updates by respective cities. Interactive chart showing the annual rate of inflation in the United States as measured by the Consumer Price Index back to 1914. The current rate of U.S. CPI inflation as of September 2019 is 256.57.