Last official estimated population of McLennan County was 235,961 (year 2014)[1]. This was 0.074% of total US population and 0.9% of total Texas state population. Area of McLennan County is 1,060.2 mi² (=2746 km²), in this year population density was 222.56 p/mi². If population growth rate would be same as in period 2010-2014 (+0.11%/yr), McLennan County population in 2026 would be 239,155 [0].
Historical population of McLennan 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] +8.08 %/yr
[1870-1880] +7.15 %/yr
[1880-1890] +3.83 %/yr
[1890-1900] +4.31 %/yr
[1900-1910] +2.05 %/yr
[1910-1920] +1.25 %/yr
[1920-1930] +1.76 %/yr
[1930-1940] +0.32 %/yr
[1940-1950] +2.48 %/yr
[1950-1960] +1.43 %/yr
[1960-1970] -0.17 %/yr
[1970-1980] +1.47 %/yr
[1980-1990] +1.03 %/yr
[1990-2000] +1.22 %/yr
[2000-2005] +0.85 %/yr
[2005-2010] +1.06 %/yr
[2010-2014] +0.11 %/yr
Looking for settlements in McLennan County? Visit this page: Settlements in McLennan County, TX
Population of McLennan County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 8913 | 8445 | 17,358 |
| 5 to 9 | 8494 | 7992 | 16,486 |
| 10 to 14 | 8338 | 8076 | 16,414 |
| 15 to 19 | 10475 | 10327 | 20,802 |
| 20 to 24 | 13094 | 12868 | 25,962 |
| 25 to 29 | 7825 | 8044 | 15,869 |
| 30 to 34 | 7544 | 7793 | 15,337 |
| 35 to 39 | 6598 | 6931 | 13,529 |
| 40 to 44 | 6457 | 6840 | 13,297 |
| 45 to 49 | 6414 | 7123 | 13,537 |
| 50 to 54 | 7400 | 7524 | 14,924 |
| 55 to 59 | 7097 | 7566 | 14,663 |
| 60 to 64 | 6029 | 6579 | 12,608 |
| 65 to 69 | 4870 | 5458 | 10,328 |
| 70 to 74 | 3398 | 4051 | 7,449 |
| 75 to 79 | 2573 | 3238 | 5,811 |
| 80 to 84 | 1788 | 2631 | 4,419 |
| 85+ | 1515 | 3133 | 4,648 |
McLennan 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 | 98010 | 101468 | 199,478 |
| WA | 96031 | 99346 | 195,377 |
| NH | 87770 | 94420 | 182,190 |
| NHWAC | 69199 | 73607 | 142,806 |
| NHWA | 67670 | 71942 | 139,612 |
| H | 31052 | 30199 | 61,251 |
| HWAC | 28811 | 27861 | 56,672 |
| HWA | 28361 | 27404 | 55,765 |
| BAC | 18368 | 20634 | 39,002 |
| BA | 17278 | 19432 | 36,710 |
| NHBAC | 17161 | 19307 | 36,468 |
| NHBA | 16306 | 18352 | 34,658 |
| AAC | 2474 | 2691 | 5,165 |
| NHAAC | 2195 | 2423 | 4,618 |
| TOM | 2156 | 2346 | 4,502 |
| IAC | 2014 | 2030 | 4,044 |
| AA | 1854 | 2047 | 3,901 |
| NHAA | 1682 | 1888 | 3,570 |
| NHTOM | 1659 | 1824 | 3,483 |
| IA | 1355 | 1327 | 2,682 |
| HBAC | 1207 | 1327 | 2,534 |
| HIAC | 1184 | 1178 | 2,362 |
| HBA | 972 | 1080 | 2,052 |
| HIA | 976 | 961 | 1,937 |
| NHIAC | 830 | 852 | 1,682 |
| HTOM | 497 | 522 | 1,019 |
| NHIA | 379 | 366 | 745 |
| HAAC | 279 | 268 | 547 |
| NAC | 266 | 260 | 526 |
| HAA | 172 | 159 | 331 |
| NHNAC | 155 | 145 | 300 |
| NA | 148 | 121 | 269 |
| HNAC | 111 | 115 | 226 |
| HNA | 74 | 73 | 147 |
| NHNA | 74 | 48 | 122 |
• Bell County population
38.7 mi,
205°
• Coryell County
36.8 mi,
252°
• Navarro County
54.8 mi,
50°
• Hill County
30.2 mi,
7°
• Milam County
53.9 mi,
166°
• Limestone County
35.8 mi,
90°
• Bosque County
35.3 mi,
313°
• Falls County
25.9 mi,
142°
• Robertson County
54.3 mi,
131°
• Hamilton County
54.7 mi,
281°
[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
*Milam, Limestone, Navarro Texas Notes
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