Answer:
Iceland, and states like Washington DC. , South Dakota, Connecticut, Idaho, New Hampshire, Delaware, North Dakota, Illinois.
Step-by-step explanation:
Iceland is one of the only places where people live without insects.
The reason why Iceland does not have mosquitos or other insects is its oceanic climate that keeps them away.
The insects freeze 3 times a year, which makes their survival in Iceland impossible.
The other states are not completely insect-free, however, their number is so small that is considered as like they don't exist.