Which country has the most mosquitoes?

While definitively identifying the single country with the absolute most mosquitoes is challenging, several regions stand out as having high mosquito populations. 

Most mosquitoes are found in Thailand, Brazil, Philippines.

Indonesia is also the country with the largest population of mosquitoes.

Regions with a high occurrence of diseases like malaria transmitted by mosquitoes likely have significant mosquito populations.

 Mosquitoes thrive in warm, humid environments with stagnant water bodies.

This region experiences a high prevalence of mosquito-borne diseases like malaria, indicating a large mosquito population.

Only a specific species of mosquito spreads chikungunya which is called aedes aegypti

Therefore, while a single country cannot be definitively named, these regions likely have some of the highest overall mosquito populations. 

Source: World Population Review