Guinea Bissau is the 161 least corrupt nation out of 180 countries, according to the 2025 Corruption Perceptions Index reported by Transparency International. Corruption Rank in Guinea Bissau averaged 160.74 from 2007 until 2025, reaching an all time high of 172.00 in 2018 and a record low of 147.00 in 2007. source: Transparency International