You probably think insects are everywhere, and you would be correct. You will not find a single home in the United States, or anywhere else, that does not have ants, beetles, or spiders. The truth is that we could not live without insects because they fill many beneficial roles in the ecosystem. For the past four decades, scientists have estimated that there are about six million insect species. However, a new study published in June 2026 in the journal Proceedings of the National Academy of Sciences (PNAS) has revised that estimate upward – a lot! How many insect species are there?
Nobody knows for sure, but the new research estimates that there are 14 to 20 million species. That is SPECIES, not the total number of insects. There are “thousands of billions” of individual ants crawling around the planet. Coming up with a total number of individual insects would be impossible, but the number far exceeds the number of people. Don’t let that bother you because they are essential to life on this planet.
The diversity of insects is also amazing. Some are so small we may not even see them. Some fly, and others crawl. We never see some of them because they live as parasites inside other insects. Many clean up organic waste in our environment. Others pollinate our crops. I am sure there are some that you would rather do without, such as flies and mosquitoes, but even they have a purpose. At the same time, you probably appreciate the beauty of butterflies.
One thing is certain. Insects are the most diverse and pervasive group of animals. Only God knows how many insect species there are, but those who study them are discovering new species every year.
— Roland Earnst © 2026
Reference: popsci.com