List of all settlements:
- Abbotsford, Clark
- Alexandria, Clark
- Amboy, Clark
- Amity, Clark
- Arkadelphia, Clark
- Ashland, Clark
- Barberton, Clark
- Battle Ground, Clark
- Blue Diamond, Clark
- Borden, Clark
- Boulder City, Clark
- Brush Prairie, Clark
- Bunkerville, Clark
- Caddo Valley, Clark
- Cal-Nev-Ari, Clark
- Camas, Clark
- Casey, Clark
- Catawba, Clark
- Charlestown, Clark
- Cherry Grove, Clark
- Chili, Clark
- Clark, Clark
- Clarksville, Clark
- Colby, Clark
- Crystal Lakes, Clark
- Curtiss, Clark
- Dollars Corner, Clark
- Donnelsville, Clark
- Dorchester, Clark
- Dubois, Clark
- Duluth, Clark
- Enterprise, Clark
- Felida, Clark
- Fern Prairie, Clark
- Five Corners, Clark
- Goodsprings, Clark
- Granton, Clark
- Green Meadows, Clark
- Greenwood, Clark
- Gum Springs, Clark
- Gurdon, Clark
- Hazel Dell, Clark
- Henderson, Clark
- Henryville, Clark
- Hockinson, Clark
- Holiday Valley, Clark
- Humbird, Clark
- Indian Springs, Clark
- Jeffersonville, Clark
- Kahoka, Clark
- La Center, Clark
- Lake Shore, Clark
- Las Vegas, Clark
- Laughlin, Clark
- Lewisville, Clark
- Loyal, Clark
- Marshall, Clark
- Martinsville, Clark
- Meadow Glade, Clark
- Memphis, Clark
- Mesquite, Clark
- Minnehaha, Clark
- Minneola, Clark
- Moapa Town, Clark
- Moapa Valley, Clark
- Mount Charleston, Clark
- Mount Vista, Clark
- Neillsville, Clark
- Nellis AFB, Clark
- New Carlisle, Clark
- New Washington, Clark
- North Hampton, Clark
- North Las Vegas, Clark
- Northridge, Clark
- Okolona, Clark
- Orchards, Clark
- Owen, Clark
- Paradise, Clark
- Park Layne, Clark
- Ridgefield, Clark
- Salmon Creek, Clark
- Sandy Valley, Clark
- Searchlight, Clark
- Sellersburg, Clark
- South Charleston, Clark
- South Vienna, Clark
- Spring Valley, Clark
- Springfield, Clark
- St. Francisville, Clark
- Summerlin South, Clark
- Sunrise Manor, Clark
- Thorp, Clark
- Tremont City, Clark
- Unity, Clark
- Utica, Clark
- Vancouver, Clark
- Venersborg, Clark
- Walnut Grove, Clark
- Washougal, Clark
- Wayland, Clark
- West Union, Clark
- Westfield, Clark
- Whitney, Clark
- Willow Lake, Clark
- Winchester, Clark
- Winchester, Clark
- Withee, Clark
- Wyaconda, Clark
- Yacolt, Clark