German Roaches vs. American Roaches: How to Tell the Difference

"I have roaches" can mean very different things. A small roach running across the kitchen counter and a large one crawling out of the bathtub drain are usually two different species — and they call for two very different treatment plans.

Here's how to tell German and American cockroaches apart.

Size and appearance

German cockroaches are small — about ½ to ⅝ inch as adults. They're light brown to tan, with two dark stripes running lengthwise on the shield just behind the head. Young German roaches are even smaller, darker and wingless.

American cockroaches are the largest common house roach in Atlanta, around 1½ to 2 inches long. They're reddish-brown with a pale, yellowish band around the shield behind the head. Many people call them palmetto bugs.

Where you see them

German roaches live indoors. You'll usually find them in kitchens and bathrooms — inside cabinets, behind appliances, and around sinks. They rarely live outside in our area.

American roaches usually live outdoors or in the hidden parts of a building: sewers, storm drains, crawl spaces, basements, and mulch beds. They tend to wander inside, especially after heavy rain or during hot, dry spells.

How many you see

Seeing one large roach now and then is typical of American roaches — they wander in from outside. Seeing several small roaches, especially during the day, is a classic sign of a German roach infestation that's growing.

How fast they multiply

This is the biggest difference. German roaches reproduce extremely quickly, and a small number can turn into a large population within a few months. American roaches reproduce much more slowly.

Why the difference matters for treatment

Because they live in different places and behave differently, these roaches need different approaches:

• German roaches need a specialized indoor program — careful inspection, professional baiting, growth regulators, monitoring and follow-up visits. A routine perimeter spray usually won't fix a German roach problem. Learn more about our German roach treatment in Atlanta.
• American roaches are usually managed from the outside in — treating where they live around the structure, reducing moisture, and sealing entry points. Recurring pest control works well here. See our American and smokybrown roach control.

What about smokybrown roaches?

Atlanta also has plenty of smokybrown cockroaches. They're about the size of a small American roach, but shiny and uniformly dark brown. Like American roaches, they mostly live outside — around gutters, trees, mulch and attics — and come inside looking for moisture and shelter.

Not sure which one you have?

Snap a photo if you can, or save one in a sealed bag. Correct identification is the first thing we do on every roach control visit, because it decides everything that comes after. You can also browse our insect library for photos of common Atlanta roaches.