Last official estimated population of Traill County was 8,113 (year 2014)[1]. This was 0.003% of total US population and 1.1% of total North Dakota state population. Area of Traill County is 862.5 mi² (=2233.9 km²), in this year population density was 9.41 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Traill County population in 2026 would be 8,089 [0].
Historical population of Traill County for period 1880-2014 [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
[1880-1890] +9.5 %/yr
[1890-1900] +2.52 %/yr
[1900-1910] -0.44 %/yr
[1910-1920] -0.27 %/yr
[1920-1930] +0.31 %/yr
[1930-1940] -0.24 %/yr
[1940-1950] -0.79 %/yr
[1950-1960] -0.71 %/yr
[1960-1970] -1 %/yr
[1970-1980] +0.06 %/yr
[1980-1990] -0.95 %/yr
[1990-2000] -0.32 %/yr
[2000-2005] -0.39 %/yr
[2005-2010] -0.48 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Traill County? Visit this page: Settlements in Traill County, ND
Population of Traill County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 283 | 235 | 518 |
| 5 to 9 | 259 | 240 | 499 |
| 10 to 14 | 243 | 244 | 487 |
| 15 to 19 | 311 | 257 | 568 |
| 20 to 24 | 280 | 250 | 530 |
| 25 to 29 | 251 | 221 | 472 |
| 30 to 34 | 216 | 186 | 402 |
| 35 to 39 | 216 | 187 | 403 |
| 40 to 44 | 209 | 219 | 428 |
| 45 to 49 | 240 | 241 | 481 |
| 50 to 54 | 333 | 267 | 600 |
| 55 to 59 | 303 | 304 | 607 |
| 60 to 64 | 294 | 256 | 550 |
| 65 to 69 | 204 | 203 | 407 |
| 70 to 74 | 153 | 183 | 336 |
| 75 to 79 | 106 | 136 | 242 |
| 80 to 84 | 95 | 127 | 222 |
| 85+ | 114 | 216 | 330 |
Traill 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 |
| WAC | 3998 | 3883 | 7,881 |
| NH | 3978 | 3846 | 7,824 |
| WA | 3939 | 3824 | 7,763 |
| NHWAC | 3882 | 3762 | 7,644 |
| NHWA | 3825 | 3708 | 7,533 |
| H | 132 | 126 | 258 |
| HWAC | 116 | 121 | 237 |
| HWA | 114 | 116 | 230 |
| IAC | 79 | 79 | 158 |
| NHIAC | 72 | 74 | 146 |
| TOM | 65 | 61 | 126 |
| NHTOM | 63 | 55 | 118 |
| BAC | 77 | 28 | 105 |
| IA | 46 | 49 | 95 |
| NHBAC | 66 | 25 | 91 |
| NHIA | 39 | 46 | 85 |
| BA | 53 | 12 | 65 |
| AAC | 20 | 39 | 59 |
| NHAAC | 20 | 37 | 57 |
| NHBA | 44 | 12 | 56 |
| AA | 7 | 25 | 32 |
| NHAA | 7 | 24 | 31 |
| HBAC | 11 | 3 | 14 |
| HIAC | 7 | 5 | 12 |
| HIA | 7 | 3 | 10 |
| NAC | 5 | 5 | 10 |
| HBA | 9 | 0 | 9 |
| NHNAC | 5 | 4 | 9 |
| HTOM | 2 | 6 | 8 |
| HAAC | 0 | 2 | 2 |
| HNAC | 0 | 1 | 1 |
| NA | 0 | 1 | 1 |
| NHNA | 0 | 1 | 1 |
| HAA | 0 | 1 | 1 |
| HNA | 0 | 0 | 0 |
• Cass County population
36.1 mi, 
186°
• Grand Forks County
35.7 mi, 
338°
• Clay County
49.2 mi, 
140°
• Polk County
42.2 mi, 
57°
• Barnes County
54.9 mi, 
230°
• Norman County
33.8 mi, 
103°
• Red Lake County
57.9 mi, 59°
• Nelson County
58.3 mi, 
304°
• Griggs County
49.9 mi, 
270°
• Steele County
25.9 mi, 270°
[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
*Pembina North Dakota Notes
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