Last official estimated population of Brown County was 6,911 (year 2014)[1]. This was 0.002% of total US population and 0.1% of total Illinois state population. Area of Brown County is 307.2 mi² (=795.7 km²), in this year population density was 22.50 p/mi². If population growth rate would be same as in period 2010-2014 (-0.09%/yr), Brown County population in 2026 would be 6,834 [0].
Historical population of Brown 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] +5.58 %/yr
[1850-1860] +3.28 %/yr
[1860-1870] +2.08 %/yr
[1870-1880] +0.66 %/yr
[1880-1890] -0.87 %/yr
[1890-1900] -0.33 %/yr
[1900-1910] -1.05 %/yr
[1910-1920] -1.07 %/yr
[1920-1930] -1.67 %/yr
[1930-1940] +0.2 %/yr
[1940-1950] -1.21 %/yr
[1950-1960] -1.37 %/yr
[1960-1970] -1.05 %/yr
[1970-1980] -0.32 %/yr
[1980-1990] +0.76 %/yr
[1990-2000] +1.77 %/yr
[2000-2005] -0.1 %/yr
[2005-2010] +0.06 %/yr
[2010-2014] -0.09 %/yr
Looking for settlements in Brown County? Visit this page: Settlements in Brown County, IL
Population of Brown County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 127 | 132 | 259 |
| 5 to 9 | 150 | 158 | 308 |
| 10 to 14 | 163 | 139 | 302 |
| 15 to 19 | 180 | 126 | 306 |
| 20 to 24 | 536 | 153 | 689 |
| 25 to 29 | 519 | 132 | 651 |
| 30 to 34 | 463 | 148 | 611 |
| 35 to 39 | 433 | 134 | 567 |
| 40 to 44 | 376 | 152 | 528 |
| 45 to 49 | 321 | 142 | 463 |
| 50 to 54 | 329 | 180 | 509 |
| 55 to 59 | 250 | 169 | 419 |
| 60 to 64 | 160 | 171 | 331 |
| 65 to 69 | 119 | 137 | 256 |
| 70 to 74 | 97 | 115 | 212 |
| 75 to 79 | 79 | 93 | 172 |
| 80 to 84 | 57 | 64 | 121 |
| 85+ | 39 | 89 | 128 |
Brown 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 | 4003 | 2404 | 6,407 |
| WAC | 2993 | 2409 | 5,402 |
| WA | 2971 | 2395 | 5,366 |
| NHWAC | 2706 | 2379 | 5,085 |
| NHWA | 2690 | 2366 | 5,056 |
| BAC | 1313 | 21 | 1,334 |
| BA | 1300 | 11 | 1,311 |
| NHBAC | 1282 | 21 | 1,303 |
| NHBA | 1277 | 11 | 1,288 |
| H | 395 | 30 | 425 |
| HWAC | 287 | 30 | 317 |
| HWA | 281 | 29 | 310 |
| IAC | 93 | 10 | 103 |
| IA | 81 | 3 | 84 |
| HIAC | 76 | 1 | 77 |
| HIA | 72 | 0 | 72 |
| TOM | 32 | 15 | 47 |
| AAC | 29 | 8 | 37 |
| HBAC | 31 | 0 | 31 |
| NHTOM | 16 | 14 | 30 |
| NHIAC | 17 | 9 | 26 |
| HBA | 23 | 0 | 23 |
| AA | 14 | 8 | 22 |
| NHAAC | 14 | 8 | 22 |
| NHAA | 11 | 8 | 19 |
| HTOM | 16 | 1 | 17 |
| HAAC | 15 | 0 | 15 |
| NHIA | 9 | 3 | 12 |
| NAC | 4 | 2 | 6 |
| HNAC | 3 | 0 | 3 |
| HAA | 3 | 0 | 3 |
| NHNAC | 1 | 2 | 3 |
| NHNA | 0 | 2 | 2 |
| NA | 0 | 2 | 2 |
| HNA | 0 | 0 | 0 |
• Adams County population
23.6 mi, 
274°
• Fulton County
45.2 mi, 
39°
• Morgan County
33.6 mi, 
120°
• McDonough County
34.3 mi, 
6°
• Hancock County
37.8 mi, 
324°
• Pike County
24.4 mi, 
197°
• Greene County
46.1 mi, 
155°
• Cass County
26.7 mi, 
88°
• Schuyler County
15.3 mi, 
28°
• Scott County
26.7 mi, 
147°
[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
*Schuyler Illinois Notes
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