Cicada Brood Hatch 2025. Maps of two cicada broods, reunited after 221 years. That’s because 2025 will see two separate batches of periodical cicadas emerge en masse, spread across much of the eastern half of the u.s.

And then you’ll hear their. One article from the university of illinois extension stated that brood xix, set to emerge in late may 2025, has a reputation for being the largest emergence of cicadas known.