Last official estimated population of Klamath County was 66,286 (year 2014)[1]. This was 0.021% of total US population and 1.6% of total Oregon state population. Area of Klamath County is 6,135.5 mi² (=15891 km²), in this year population density was 10.80 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Klamath County population in 2026 would be 66,005 [0].
Historical population of Klamath County for period 1890-2014 [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
[1890-1900] +4.97 %/yr
[1900-1910] +7.98 %/yr
[1910-1920] +2.93 %/yr
[1920-1930] +11 %/yr
[1930-1940] +2.25 %/yr
[1940-1950] +0.4 %/yr
[1950-1960] +1.2 %/yr
[1960-1970] +0.52 %/yr
[1970-1980] +1.68 %/yr
[1980-1990] -0.24 %/yr
[1990-2000] +1.01 %/yr
[2000-2005] +0.55 %/yr
[2005-2010] +0.25 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Klamath County? Visit this page: Settlements in Klamath County, OR
Population of Klamath County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1970 | 1969 | 3,939 |
| 5 to 9 | 2008 | 1925 | 3,933 |
| 10 to 14 | 1953 | 1806 | 3,759 |
| 15 to 19 | 2178 | 1942 | 4,120 |
| 20 to 24 | 2205 | 2068 | 4,273 |
| 25 to 29 | 2056 | 1965 | 4,021 |
| 30 to 34 | 1790 | 1771 | 3,561 |
| 35 to 39 | 1685 | 1661 | 3,346 |
| 40 to 44 | 1859 | 1856 | 3,715 |
| 45 to 49 | 1901 | 1902 | 3,803 |
| 50 to 54 | 2190 | 2340 | 4,530 |
| 55 to 59 | 2341 | 2451 | 4,792 |
| 60 to 64 | 2456 | 2637 | 5,093 |
| 65 to 69 | 2179 | 2092 | 4,271 |
| 70 to 74 | 1587 | 1608 | 3,195 |
| 75 to 79 | 1086 | 1147 | 2,233 |
| 80 to 84 | 723 | 818 | 1,541 |
| 85+ | 494 | 836 | 1,330 |
Klamath 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 | 30377 | 30540 | 60,917 |
| WA | 29167 | 29285 | 58,452 |
| NH | 28553 | 29118 | 57,671 |
| NHWAC | 26743 | 27288 | 54,031 |
| NHWA | 25756 | 26238 | 51,994 |
| H | 4108 | 3676 | 7,784 |
| HWAC | 3634 | 3252 | 6,886 |
| HWA | 3411 | 3047 | 6,458 |
| IAC | 2385 | 2411 | 4,796 |
| NHIAC | 1845 | 1932 | 3,777 |
| IA | 1524 | 1528 | 3,052 |
| TOM | 1282 | 1309 | 2,591 |
| NHIA | 1155 | 1207 | 2,362 |
| NHTOM | 1048 | 1096 | 2,144 |
| AAC | 537 | 576 | 1,113 |
| HIAC | 540 | 479 | 1,019 |
| BAC | 538 | 479 | 1,017 |
| NHAAC | 479 | 529 | 1,008 |
| NHBAC | 462 | 393 | 855 |
| HIA | 369 | 321 | 690 |
| AA | 312 | 362 | 674 |
| NHAA | 288 | 341 | 629 |
| BA | 307 | 254 | 561 |
| NHBA | 267 | 201 | 468 |
| HTOM | 234 | 213 | 447 |
| NAC | 154 | 136 | 290 |
| NHNAC | 111 | 105 | 216 |
| HBAC | 76 | 86 | 162 |
| NA | 69 | 56 | 125 |
| HAAC | 58 | 47 | 105 |
| HBA | 40 | 53 | 93 |
| HNAC | 43 | 31 | 74 |
| NHNA | 39 | 35 | 74 |
| HNA | 30 | 21 | 51 |
| HAA | 24 | 21 | 45 |
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[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
*Lake Oregon Notes
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