Issued on Wednesday, the OECD's International Survey of Adult Financial Literacy Competencies found that Finland is the second most financially-literate country in the world.
Only the country of France fared better in the study, which involved some 51,650 people across 30 countries.
The OECD said that the portion of the survey concerning financial behaviour was carried out with the help of questions concerning how people budget and pay their bills.
In order to determine peoples' financial attitudes, questions were asked about their saving and future financial planning measures. General knowledge of finances was measured by respondents' answers to questions about interest rates and inflation.
France, the leader of the list, had an average score of 14.9. In a close second place, Finland scored 14.8 and received generally strong scores in all of the areas.
The overall average score of the study - which assessed financial knowledge, attitudes and behaviour across all countries - was 13.2 out of a possible 21.
The study was carried out in Finland by researchers from the University of Tampere and the University of Vaasa.
Poor financial literacy global problem
The OECD said that weak financial skills and knowledge is a global problem.
In particular, the organisation said peoples' difficulties with understanding issues like interest rates and the diversification of investments were concerning.
The OECD says that financial literacy skills should be taught in schools and said that government officials - as well as consumer protection agencies - of countries should take note that economic matters can be challenging for people.