Last official estimated population of Martin County was 20,825 (year 2014)[1]. This was 0.007% of total US population and 0.4% of total Minnesota state population. Area of Martin County is 729.6 mi² (=1889.6 km²), in this year population density was 28.54 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Martin County population in 2025 would be 20,784 [0].
Historical population of Martin County for period 1860-2014 [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
[1860-1870] +38.31 %/yr
[1870-1880] +3.1 %/yr
[1880-1890] +6 %/yr
[1890-1900] +6.06 %/yr
[1900-1910] +0.34 %/yr
[1910-1920] +1.87 %/yr
[1920-1930] +0.61 %/yr
[1930-1940] +0.96 %/yr
[1940-1950] +0.4 %/yr
[1950-1960] +0.51 %/yr
[1960-1970] -1.04 %/yr
[1970-1980] +0.15 %/yr
[1980-1990] -0.74 %/yr
[1990-2000] -0.49 %/yr
[2000-2005] -0.69 %/yr
[2005-2010] -0.21 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Martin County? Visit this page: Settlements in Martin County, MN
Population of Martin County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 553 | 540 | 1,093 |
| 5 to 9 | 633 | 631 | 1,264 |
| 10 to 14 | 591 | 649 | 1,240 |
| 15 to 19 | 602 | 568 | 1,170 |
| 20 to 24 | 542 | 536 | 1,078 |
| 25 to 29 | 515 | 492 | 1,007 |
| 30 to 34 | 594 | 537 | 1,131 |
| 35 to 39 | 489 | 482 | 971 |
| 40 to 44 | 526 | 522 | 1,048 |
| 45 to 49 | 572 | 551 | 1,123 |
| 50 to 54 | 742 | 787 | 1,529 |
| 55 to 59 | 881 | 808 | 1,689 |
| 60 to 64 | 778 | 715 | 1,493 |
| 65 to 69 | 589 | 584 | 1,173 |
| 70 to 74 | 437 | 480 | 917 |
| 75 to 79 | 347 | 412 | 759 |
| 80 to 84 | 253 | 360 | 613 |
| 85+ | 307 | 615 | 922 |
Martin 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 | 9759 | 10095 | 19,854 |
| WA | 9674 | 9997 | 19,671 |
| NH | 9541 | 9901 | 19,442 |
| NHWAC | 9388 | 9749 | 19,137 |
| NHWA | 9321 | 9668 | 18,989 |
| H | 410 | 368 | 778 |
| HWAC | 371 | 346 | 717 |
| HWA | 353 | 329 | 682 |
| BAC | 118 | 85 | 203 |
| TOM | 93 | 107 | 200 |
| AAC | 82 | 105 | 187 |
| NHBAC | 98 | 69 | 167 |
| IAC | 80 | 83 | 163 |
| NHTOM | 75 | 88 | 163 |
| NHAAC | 69 | 94 | 163 |
| AA | 60 | 82 | 142 |
| NHIAC | 56 | 71 | 127 |
| NHAA | 49 | 74 | 123 |
| BA | 81 | 40 | 121 |
| NHBA | 67 | 32 | 99 |
| IA | 39 | 41 | 80 |
| NHIA | 26 | 37 | 63 |
| HTOM | 18 | 19 | 37 |
| HIAC | 24 | 12 | 36 |
| HBAC | 20 | 16 | 36 |
| HAAC | 13 | 11 | 24 |
| HBA | 14 | 8 | 22 |
| HAA | 11 | 8 | 19 |
| HIA | 13 | 4 | 17 |
| NAC | 8 | 8 | 16 |
| NHNAC | 7 | 6 | 13 |
| NA | 4 | 2 | 6 |
| NHNA | 3 | 2 | 5 |
| HNAC | 1 | 2 | 3 |
| HNA | 1 | 0 | 1 |
• Blue Earth County population
34.1 mi, 
43°
• Brown County
40.5 mi, 
346°
• Dickinson County
38.5 mi, 
238°
• Kossuth County
36 mi, 
153°
• Faribault County
29.5 mi, 
90°
• Cottonwood County
39.6 mi, 
305°
• Watonwan County
21.2 mi, 349°
• Emmet County
21.7 mi, 
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• Jackson County
30.6 mi, 
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• Palo Alto County
42.1 mi, 
189°
[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
*Wabasha Minnesota Notes
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