The findings of an online survey conducted among 2.3 million people worldwide in 2018, show that the Dutch are the most fluent.
The results of this English Proficiency Index, based on a free online test taken by 2.3 million volunteers, show that "Sweden was positioned just below, with a score of 68.74 out of 100, while Norway came in third with 67.93 points."
Also, Denmark and Singapore make this list of the first five countries.
They are followed by South Africa, Finland, Austria, Luxembourg and Germany.
This survey provided by EF Education First show that Croatia comes in 14th, and is placed between Belgium and Hungary.
The first 14 countries are categorised as showing very high proficiency in English.
Croatia and Portugal are two European countries with the best progress between the last two survey.
At the very bottom of the ranking is Libya, and Kyrgyzstan ranks 99th and Saudi Arabia 98th.
EF Education First's poll was measured by testing non-native English speakers in 100 countries and over 400 cities and regions.
When it comes to cities, Amsterdam tops the ranking, and Zagreb comes in 14th.
Broken down by gender, women surpass men in the knowledge of English but this gap is being narrowed.
The report also found that English was by far the most widely studied second language in the world.