Here's what to know and how to keep yourself and animals safe: When is tick season in Ohio? Ohio is home to three main tick varieties: American Dog Ticks, Blacklegged (deer) ticks and Lone Star Ticks. While these ticks generally stick around the entire year, according to Pest World, Ohioans should worry most from spring to mid-summer, and then again in fall, when the population reaches their highest activity levels. How do I avoid getting ticks? Be prepared: Know when and where to expect ticks. Wooded areas, tall grass and road edges are key spots. Stick to the centers of trails.