| Rank | County | Population (2012) | 
                            
                                
                                    | 1 | Cass County, North Dakota | 156,157 | 
                            
                                
                                    | 2 | Burleigh County, North Dakota | 85,774 | 
                            
                                
                                    | 3 | Grand Forks County, North Dakota | 67,472 | 
                            
                                
                                    | 4 | Ward County, North Dakota | 64,798 | 
                            
                                
                                    | 5 | Morton County, North Dakota | 28,101 | 
                            
                                
                                    | 6 | Stark County, North Dakota | 26,771 | 
                            
                                
                                    | 7 | Williams County, North Dakota | 26,697 | 
                            
                                
                                    | 8 | Stutsman County, North Dakota | 20,934 | 
                            
                                
                                    | 9 | Richland County, North Dakota | 16,217 | 
                            
                                
                                    | 10 | Rolette County, North Dakota | 14,382 | 
                            
                                
                                    | 11 | Ramsey County, North Dakota | 11,536 | 
                            
                                
                                    | 12 | Walsh County, North Dakota | 11,046 | 
                            
                                
                                    | 13 | Barnes County, North Dakota | 11,015 | 
                            
                                
                                    | 14 | McLean County, North Dakota | 9,309 | 
                            
                                
                                    | 15 | Mountrail County, North Dakota | 8,734 | 
                            
                                
                                    | 16 | Mercer County, North Dakota | 8,486 | 
                            
                                
                                    | 17 | Traill County, North Dakota | 8,072 | 
                            
                                
                                    | 18 | McKenzie County, North Dakota | 7,987 | 
                            
                                
                                    | 19 | Pembina County, North Dakota | 7,271 | 
                            
                                
                                    | 20 | Benson County, North Dakota | 6,760 | 
                            
                                
                                    | 21 | Bottineau County, North Dakota | 6,579 | 
                            
                                
                                    | 22 | McHenry County, North Dakota | 5,789 | 
                            
                                
                                    | 23 | Ransom County, North Dakota | 5,444 | 
                            
                                
                                    | 24 | Dickey County, North Dakota | 5,268 | 
                            
                                
                                    | 25 | Pierce County, North Dakota | 4,457 | 
                            
                                
                                    | 26 | Sioux County, North Dakota | 4,347 | 
                            
                                
                                    | 27 | Wells County, North Dakota | 4,271 | 
                            
                                
                                    | 28 | LaMoure County, North Dakota | 4,114 | 
                            
                                
                                    | 29 | Dunn County, North Dakota | 3,967 | 
                            
                                
                                    | 30 | Cavalier County, North Dakota | 3,948 | 
                            
                                
                                    | 31 | Sargent County, North Dakota | 3,896 | 
                            
                                
                                    | 32 | Emmons County, North Dakota | 3,491 | 
                            
                                
                                    | 33 | Foster County, North Dakota | 3,392 | 
                            
                                
                                    | 34 | Bowman County, North Dakota | 3,202 | 
                            
                                
                                    | 35 | Nelson County, North Dakota | 3,080 | 
                            
                                
                                    | 36 | McIntosh County, North Dakota | 2,751 | 
                            
                                
                                    | 37 | Renville County, North Dakota | 2,559 | 
                            
                                
                                    | 38 | Hettinger County, North Dakota | 2,553 | 
                            
                                
                                    | 39 | Kidder County, North Dakota | 2,426 | 
                            
                                
                                    | 40 | Eddy County, North Dakota | 2,368 | 
                            
                                
                                    | 41 | Griggs County, North Dakota | 2,362 | 
                            
                                
                                    | 42 | Grant County, North Dakota | 2,333 | 
                            
                                
                                    | 43 | Towner County, North Dakota | 2,318 | 
                            
                                
                                    | 44 | Adams County, North Dakota | 2,311 | 
                            
                                
                                    | 45 | Divide County, North Dakota | 2,228 | 
                            
                                
                                    | 46 | Burke County, North Dakota | 2,171 | 
                            
                                
                                    | 47 | Steele County, North Dakota | 1,989 | 
                            
                                
                                    | 48 | Logan County, North Dakota | 1,924 | 
                            
                                
                                    | 49 | Oliver County, North Dakota | 1,838 | 
                            
                                
                                    | 50 | Golden Valley County, North Dakota | 1,804 | 
                            
                                
                                    | 51 | Sheridan County, North Dakota | 1,266 | 
                            
                                
                                    | 52 | Billings County, North Dakota | 905 | 
                            
                                
                                    | 53 | Slope County, North Dakota | 758 |