COUNTIES WE SERVE Common Ground Healthcare Cooperative proudly serves the 22 counties that make up eastern Wisconsin. BROWN | CALUMET | DOOR | FLORENCE | FOND DU LAC | GREEN LAKE | KENOSHA | KEWAUNEE | MANITOWOC | MARINETTE | MILWAUKEE | OCONTO | OUTAGAMIE | OZAUKEE | RACINE | SHAWANO | SHEBOYGAN | WASHINGTON | WAUKESHA | WAUPACA | WAUSHARA | WINNEBAGO