Last official estimated population of Bureau County was 34,905 (year 2014)[1]. This was 0.011% of total US population and 0.3% of total Illinois state population. Area of Bureau County is 873.5 mi² (=2262.4 km²), in this year population density was 39.96 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Bureau County population in 2025 would be 34,705 [0].
Historical population of Bureau County for period 1840-2014 [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
[1840-1850] +11.17 %/yr
[1850-1860] +11.57 %/yr
[1860-1870] +2.06 %/yr
[1870-1880] +0.23 %/yr
[1880-1890] +0.54 %/yr
[1890-1900] +1.62 %/yr
[1900-1910] +0.68 %/yr
[1910-1920] -0.31 %/yr
[1920-1930] -0.93 %/yr
[1930-1940] -0.33 %/yr
[1940-1950] +0.03 %/yr
[1950-1960] -0.03 %/yr
[1960-1970] +0.25 %/yr
[1970-1980] +0.15 %/yr
[1980-1990] -0.91 %/yr
[1990-2000] -0.05 %/yr
[2000-2005] -0.29 %/yr
[2005-2010] +0 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Bureau County? Visit this page: Settlements in Bureau County, IL
Population of Bureau County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 879 | 825 | 1,704 |
| 5 to 9 | 1037 | 1013 | 2,050 |
| 10 to 14 | 1144 | 1137 | 2,281 |
| 15 to 19 | 1051 | 1050 | 2,101 |
| 20 to 24 | 958 | 923 | 1,881 |
| 25 to 29 | 825 | 832 | 1,657 |
| 30 to 34 | 980 | 910 | 1,890 |
| 35 to 39 | 953 | 943 | 1,896 |
| 40 to 44 | 950 | 1001 | 1,951 |
| 45 to 49 | 1118 | 1080 | 2,198 |
| 50 to 54 | 1237 | 1258 | 2,495 |
| 55 to 59 | 1268 | 1334 | 2,602 |
| 60 to 64 | 1178 | 1205 | 2,383 |
| 65 to 69 | 961 | 990 | 1,951 |
| 70 to 74 | 706 | 817 | 1,523 |
| 75 to 79 | 571 | 655 | 1,226 |
| 80 to 84 | 366 | 519 | 885 |
| 85+ | 390 | 776 | 1,166 |
Bureau 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 | 16245 | 16830 | 33,075 |
| WA | 16054 | 16652 | 32,706 |
| NH | 15071 | 15843 | 30,914 |
| NHWAC | 14817 | 15502 | 30,319 |
| NHWA | 14655 | 15347 | 30,002 |
| H | 1501 | 1425 | 2,926 |
| HWAC | 1428 | 1328 | 2,756 |
| HWA | 1399 | 1305 | 2,704 |
| BAC | 259 | 263 | 522 |
| NHBAC | 211 | 208 | 419 |
| TOM | 195 | 183 | 378 |
| AAC | 143 | 217 | 360 |
| NHAAC | 131 | 203 | 334 |
| NHTOM | 166 | 160 | 326 |
| BA | 145 | 158 | 303 |
| AA | 110 | 192 | 302 |
| NHAA | 99 | 180 | 279 |
| IAC | 117 | 136 | 253 |
| NHBA | 119 | 118 | 237 |
| NHIAC | 75 | 87 | 162 |
| IA | 61 | 79 | 140 |
| HBAC | 48 | 55 | 103 |
| HIAC | 42 | 49 | 91 |
| HIA | 35 | 42 | 77 |
| HBA | 26 | 40 | 66 |
| NHIA | 26 | 37 | 63 |
| HTOM | 29 | 23 | 52 |
| HAAC | 12 | 14 | 26 |
| HAA | 11 | 12 | 23 |
| NAC | 12 | 10 | 22 |
| NHNAC | 11 | 7 | 18 |
| NA | 7 | 4 | 11 |
| NHNA | 6 | 1 | 7 |
| HNAC | 1 | 3 | 4 |
| HNA | 1 | 3 | 4 |
• Peoria County population
44.3 mi, 
196°
• LaSalle County
33.5 mi, 
96°
• Whiteside County
31.2 mi, 
320°
• Ogle County
45.5 mi, 
13°
• Henry County
31.4 mi, 
263°
• Woodford County
45.4 mi, 
158°
• Lee County
26.7 mi, 
26°
• Marshall County
27.3 mi, 159°
• Putnam County
18.4 mi, 
139°
• Stark County
25.3 mi, 
213°
[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
*Jo Daviess, Putnam Illinois Notes
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