Last official estimated population of Liberty County was 2,354 (year 2014)[1]. This was 0.001% of total US population and 0.2% of total Montana state population. Area of Liberty County is 1,447.3 mi² (=3748.5 km²), in this year population density was 1.63 p/mi². If population growth rate would be same as in period 2010-2014 (+0.16%/yr), Liberty County population in 2026 would be 2,400 [0].
Historical population of Liberty County for period 1920-2014 [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

[1920-1930] -0.94 %/yr
[1930-1940] +0.05 %/yr
[1940-1950] -0.13 %/yr
[1950-1960] +1.87 %/yr
[1960-1970] -1.06 %/yr
[1970-1980] -0.13 %/yr
[1980-1990] -0.15 %/yr
[1990-2000] -0.61 %/yr
[2000-2005] +0.98 %/yr
[2005-2010] +0.64 %/yr
[2010-2014] +0.16 %/yr
Looking for settlements in Liberty County? Visit this page: Settlements in Liberty County, MT
Population of Liberty County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 57 | 78 | 135 |
| 5 to 9 | 63 | 66 | 129 |
| 10 to 14 | 71 | 72 | 143 |
| 15 to 19 | 80 | 68 | 148 |
| 20 to 24 | 55 | 79 | 134 |
| 25 to 29 | 64 | 77 | 141 |
| 30 to 34 | 76 | 68 | 144 |
| 35 to 39 | 49 | 62 | 111 |
| 40 to 44 | 57 | 54 | 111 |
| 45 to 49 | 68 | 83 | 151 |
| 50 to 54 | 93 | 100 | 193 |
| 55 to 59 | 93 | 108 | 201 |
| 60 to 64 | 85 | 67 | 152 |
| 65 to 69 | 57 | 46 | 103 |
| 70 to 74 | 53 | 53 | 106 |
| 75 to 79 | 38 | 49 | 87 |
| 80 to 84 | 30 | 46 | 76 |
| 85+ | 35 | 59 | 94 |
Liberty 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 | 1111 | 1232 | 2,343 |
| WAC | 1117 | 1222 | 2,339 |
| NHWAC | 1104 | 1219 | 2,323 |
| WA | 1108 | 1207 | 2,315 |
| NHWA | 1095 | 1204 | 2,299 |
| TOM | 9 | 17 | 26 |
| NHTOM | 9 | 17 | 26 |
| NHIAC | 6 | 16 | 22 |
| IAC | 6 | 16 | 22 |
| H | 13 | 3 | 16 |
| HWA | 13 | 3 | 16 |
| HWAC | 13 | 3 | 16 |
| BAC | 7 | 5 | 12 |
| NHBAC | 7 | 5 | 12 |
| NHAAC | 3 | 9 | 12 |
| AAC | 3 | 9 | 12 |
| NHBA | 5 | 2 | 7 |
| BA | 5 | 2 | 7 |
| IA | 1 | 6 | 7 |
| NHIA | 1 | 6 | 7 |
| AA | 1 | 2 | 3 |
| NHAA | 1 | 2 | 3 |
| NAC | 1 | 1 | 2 |
| NHNAC | 1 | 1 | 2 |
| NA | 0 | 1 | 1 |
| NHNA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HIAC | 0 | 0 | 0 |
| HBAC | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
| HTOM | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HIA | 0 | 0 | 0 |
• Cascade County population
87.1 mi,
189°
• Lewis and Clark County
117.3 mi,
212°
• Hill County
42.8 mi,
83°
• Glacier County
89.8 mi,
276°
• Blaine County
95.2 mi,
95°
• Pondera County
58.8 mi,
247°
• Teton County
76.8 mi,
228°
• Chouteau County
54.1 mi,
149°
• Toole County
32.4 mi,
280°
• Judith Basin County
110.8 mi,
162°
[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
*Chouteau Montana Notes
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