Last official estimated population of Assumption Parish was 23,360 (year 2014)[1]. This was 0.007% of total US population and 0.5% of total Louisiana state population. Area of Assumption Parish is 364.5 mi² (=944.1 km²), in this year population density was 64.08 p/mi². If population growth rate would be same as in period 2010-2014 (-0.07%/yr), Assumption Parish population in 2026 would be 23,178 [0].
Historical population of Assumption Parish for period 1810-2014 [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

[1810-1820] +3.76 %/yr
[1820-1830] +4.72 %/yr
[1830-1840] +2.34 %/yr
[1840-1850] +3.97 %/yr
[1850-1860] +3.85 %/yr
[1860-1870] -1.49 %/yr
[1870-1880] +2.54 %/yr
[1880-1890] +1.44 %/yr
[1890-1900] +0.97 %/yr
[1900-1910] +1.1 %/yr
[1910-1920] -2.94 %/yr
[1920-1930] -1.13 %/yr
[1930-1940] +1.49 %/yr
[1940-1950] -0.7 %/yr
[1950-1960] +0.41 %/yr
[1960-1970] +0.89 %/yr
[1970-1980] +1.17 %/yr
[1980-1990] +0.3 %/yr
[1990-2000] +0.26 %/yr
[2000-2005] -0.12 %/yr
[2005-2010] +0.19 %/yr
[2010-2014] -0.07 %/yr
Looking for settlements in Assumption Parish? Visit this page: Settlements in Assumption Parish, LA
Population of Assumption Parish by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 680 | 622 | 1,302 |
| 5 to 9 | 759 | 706 | 1,465 |
| 10 to 14 | 789 | 766 | 1,555 |
| 15 to 19 | 734 | 721 | 1,455 |
| 20 to 24 | 820 | 780 | 1,600 |
| 25 to 29 | 698 | 715 | 1,413 |
| 30 to 34 | 693 | 749 | 1,442 |
| 35 to 39 | 622 | 684 | 1,306 |
| 40 to 44 | 647 | 731 | 1,378 |
| 45 to 49 | 772 | 833 | 1,605 |
| 50 to 54 | 859 | 918 | 1,777 |
| 55 to 59 | 845 | 900 | 1,745 |
| 60 to 64 | 713 | 768 | 1,481 |
| 65 to 69 | 591 | 591 | 1,182 |
| 70 to 74 | 423 | 470 | 893 |
| 75 to 79 | 286 | 290 | 576 |
| 80 to 84 | 169 | 238 | 407 |
| 85+ | 168 | 284 | 452 |
Assumption Parish 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 | 10940 | 11497 | 22,437 |
| WAC | 7852 | 8041 | 15,893 |
| WA | 7751 | 7949 | 15,700 |
| NHWAC | 7580 | 7805 | 15,385 |
| NHWA | 7486 | 7722 | 15,208 |
| BAC | 3347 | 3665 | 7,012 |
| NHBAC | 3308 | 3630 | 6,938 |
| BA | 3284 | 3603 | 6,887 |
| NHBA | 3251 | 3576 | 6,827 |
| H | 328 | 269 | 597 |
| HWAC | 272 | 236 | 508 |
| HWA | 265 | 227 | 492 |
| TOM | 108 | 103 | 211 |
| IAC | 103 | 108 | 211 |
| NHTOM | 101 | 92 | 193 |
| NHIAC | 89 | 99 | 188 |
| IA | 71 | 68 | 139 |
| NHIA | 58 | 64 | 122 |
| AAC | 60 | 50 | 110 |
| NHAAC | 54 | 50 | 104 |
| AA | 43 | 38 | 81 |
| NHAA | 37 | 38 | 75 |
| HBAC | 39 | 35 | 74 |
| HBA | 33 | 27 | 60 |
| NAC | 19 | 9 | 28 |
| NHNAC | 14 | 9 | 23 |
| HIAC | 14 | 9 | 23 |
| HTOM | 7 | 11 | 18 |
| HIA | 13 | 4 | 17 |
| NA | 11 | 5 | 16 |
| NHNA | 7 | 5 | 12 |
| HAAC | 6 | 0 | 6 |
| HAA | 6 | 0 | 6 |
| HNAC | 5 | 0 | 5 |
| HNA | 4 | 0 | 4 |
• Livingston Parish population
42.2 mi,
27°
• Terrebonne Parish
41 mi,
162°
• Ascension Parish
22.8 mi,
21°
• St. Mary Parish
30.9 mi,
232°
• St. Charles Parish
41.6 mi,
89°
• St. Martin Parish
36.8 mi,
294°
• St. John the Baptist Parish
38 mi,
63°
• Iberville Parish
31.8 mi,
323°
• West Baton Rouge Parish
42 mi,
338°
• St. James Parish
17.8 mi,
60°
[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
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