Hyla versicolor, commonly known as the gray treefrog, is native to North America. Its geographical distribution spans the eastern United States and southeastern Canada. Specifically, it is found from southern Ontario and Quebec in Canada, extending southward into the United States, reaching as far as eastern Texas and northern Florida, and eastward to the Atlantic coast.

The gray treefrog inhabits a variety of forested environments, including deciduous and mixed woodlands. It is often found in areas near permanent or temporary bodies of water such as ponds, lakes, swamps, and marshes. This species thrives in humid conditions and requires elevated, moist environments due to its arboreal lifestyle.

Hyla versicolor is adapted to live in treetop habitats, using its excellent climbing skills facilitated by sticky toepads. This species primarily feeds on insects and other small invertebrates. It plays a role in controlling insect populations and serves as prey for larger predators, contributing to its ecosystem's trophic structure. During the breeding season, which typically occurs from late spring to early summer, it relies on aquatic environments for egg deposition and tadpole development.