County

County generally refers to one of the following:

Locations

 * Whitney County ― The main location and setting for the Crash Course campaign in Left 4 Dead.
 * Griffin County ―The main location and setting for the Dark Carnival campaign in Left 4 Dead 2.
 * Fort Harris County ―The city and setting for the custom campaign, Suicide Blitz.
 * Newburg ― The Survivors pass by thr Tri-County Communications building/power station on their way to Metro International Airport in the Dead Air campaign.

Gameplay

 * Crash Course ― The campaign set in the county.
 * Dark Carnival ― The campaign takes place at an amusement park which is inside a county.
 * Suicide Blitz ― The custom campaign takes place in a city/county.