Eastern chipmunk reporting in Ohio surges to a pronounced May high, falls through August, and rises again in September and October. Very few reports arrive in December and January. That deep winter dip and smaller fall rebound are more informative than calling the pattern simply year-round, though they don’t separate chipmunk activity from the times when people are outside to notice them.
Cuyahoga Valley National Park and Wayne National Forest frame two different wooded parts of Ohio, one in the northeast and one across the southeast. Ottawa National Wildlife Refuge extends the suggested settings to the Lake Erie shore. The spread points to woodland and wooded-edge records across the state, not a ranking of local populations.
