Identify Your Pest

American Cockroach Size - Termite Inspection Kansas City

American Cockroach

Quick Facts


Size can reach up to 1.6 in. (41 mm) long.

Preferred Habitat

Tropical/warm climates with access to decaying food.

Known Health Issues

Known to cause allergic reactions and spread disease-causing bacteria to human food sources.
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Commonly found in tropical climates where it is warm and they have access to decaying food, the American cockroach, also referred to as the waterbug, emerges during the Midwest’s summer months. At up to 1.6 inches (41 mm) long, this is the largest known species of common cockroaches. American cockroaches are nocturnal and have the ability to fit themselves into tight cracks or spaces and move quickly out of sight when confronted by humans.

Finding a large cockroach infestation in your home is unlikely, due to the fact that these cockroaches are so big and develop at a slow rate. However, cockroaches can transmit disease-causing bacteria, like Salmonella, to human food or cause allergic reactions in people.