Liberia has made a slight improvement in this year's ranking by the watchdog Group, Transparency International.
Liberia scored 38 points in the TI ranking this year to place it 83rd place out of 177 countries rated.
Liberia has the same score this year along with Jamaica, Burkina Faso, Mongolia, Peru, Trinidad and Tobago and Zambia.
In the 2013 Corruption Perceptions Index, Denmark and New Zealand tied for first place out of 177 countries - meaning they were perceived to have the lowest levels of state sector graft.
Finland and Sweden were joint third and Norway was ranked fifth.
Germany came in 12th, one notch better than 2012, while Japan slipped one place to 18.
The United States and China were unchanged from 2012 levels at 19th and 80th place respectively.
The 2013 index ranks countries by their perceived levels of public sector corruption.
The index assigns scores of between one and 100, 1 being highly corrupt and 100 clean.
In July, the watchdog monitoring group rated Liberia and Mongolia as the two most corrupt countries in the world, according to its Global Corruption Barometer. In both countries, 86% of residents believe corruption in the public sector is a very serious problem. Residents in the vast majority of countries around the world believe corruption has only gotten worse in the past two years.