Last official estimated population of Williams County was 22,573 (year 2014)[1]. This was 0.007% of total US population and 3% of total North Dakota state population. Area of Williams County is 2,148.1 mi² (=5563.7 km²), in this year population density was 10.51 p/mi². If population growth rate would be same as in period 2010-2014 (+0.19%/yr), Williams County population in 2026 would be 23,106 [0].
Historical population of Williams County for period 1900-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1900-1910] +24.99 %/yr
[1910-1920] +2.36 %/yr
[1920-1930] +0.84 %/yr
[1930-1940] -1.79 %/yr
[1940-1950] +0.08 %/yr
[1950-1960] +2.98 %/yr
[1960-1970] -1.32 %/yr
[1970-1980] +1.43 %/yr
[1980-1990] -0.51 %/yr
[1990-2000] -0.67 %/yr
[2000-2005] +0.1 %/yr
[2005-2010] +2.44 %/yr
[2010-2014] +0.19 %/yr
Looking for settlements in Williams County? Visit this page: Settlements in Williams County, ND
Population of Williams County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1398 | 1261 | 2,659 |
| 5 to 9 | 1164 | 1174 | 2,338 |
| 10 to 14 | 955 | 1003 | 1,958 |
| 15 to 19 | 1015 | 917 | 1,932 |
| 20 to 24 | 1585 | 1227 | 2,812 |
| 25 to 29 | 1946 | 1269 | 3,215 |
| 30 to 34 | 1519 | 1082 | 2,601 |
| 35 to 39 | 1225 | 813 | 2,038 |
| 40 to 44 | 986 | 769 | 1,755 |
| 45 to 49 | 1005 | 833 | 1,838 |
| 50 to 54 | 1258 | 985 | 2,243 |
| 55 to 59 | 1234 | 987 | 2,221 |
| 60 to 64 | 843 | 655 | 1,498 |
| 65 to 69 | 472 | 438 | 910 |
| 70 to 74 | 282 | 324 | 606 |
| 75 to 79 | 226 | 298 | 524 |
| 80 to 84 | 174 | 275 | 449 |
| 85+ | 171 | 362 | 533 |
Williams County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 16528 | 13931 | 30,459 |
| WAC | 16142 | 13662 | 29,804 |
| WA | 15684 | 13225 | 28,909 |
| NHWAC | 15313 | 12996 | 28,309 |
| NHWA | 14883 | 12603 | 27,486 |
| IAC | 1003 | 964 | 1,967 |
| NHIAC | 923 | 901 | 1,824 |
| H | 930 | 741 | 1,671 |
| HWAC | 829 | 666 | 1,495 |
| HWA | 801 | 622 | 1,423 |
| IA | 646 | 613 | 1,259 |
| NHIA | 583 | 575 | 1,158 |
| TOM | 468 | 453 | 921 |
| BAC | 592 | 304 | 896 |
| NHTOM | 440 | 407 | 847 |
| NHBAC | 551 | 264 | 815 |
| BA | 526 | 232 | 758 |
| NHBA | 493 | 206 | 699 |
| AAC | 171 | 191 | 362 |
| NHAAC | 161 | 175 | 336 |
| AA | 117 | 137 | 254 |
| NHAA | 112 | 128 | 240 |
| HIAC | 80 | 63 | 143 |
| HIA | 63 | 38 | 101 |
| HBAC | 41 | 40 | 81 |
| HTOM | 28 | 46 | 74 |
| HBA | 33 | 26 | 59 |
| NAC | 32 | 26 | 58 |
| NHNAC | 29 | 22 | 51 |
| NHNA | 17 | 12 | 29 |
| NA | 17 | 12 | 29 |
| HAAC | 10 | 16 | 26 |
| HAA | 5 | 9 | 14 |
| HNAC | 3 | 4 | 7 |
| HNA | 0 | 0 | 0 |
• Ward County population
90.7 mi, 
96°
• Roosevelt County
68.8 mi, 
265°
• Richland County
62.9 mi, 
231°
• Mountrail County
53.2 mi, 100°
• McKenzie County
42.6 mi, 
173°
• Dunn County
80.5 mi, 
149°
• Sheridan County
53.1 mi, 
297°
• Renville County
87.9 mi, 
73°
• Divide County
31.7 mi, 
359°
• Burke County
53.8 mi, 
56°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Flannery, Buford North Dakota Notes
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