| 年份 | 衡南县人口(万人) | 常宁市人口(万人) | 对比差值(万人) | 
|---|---|---|---|
| 2024 | - | ||
| 2023 | - | ||
| 2022 | - | ||
| 2021 | - | ||
| 2020 | - | ||
| 2019 | - | ||
| 2018 | - | ||
| 2017 | 94.62 | 82.36 | 12.26 | 
| 2016 | 97.14 | 83.14 | 14.00 | 
| 2015 | 97.94 | 83.44 | 14.50 | 
| 2014 | 97.38 | 82.86 | 14.52 | 
| 2013 | 96.86 | 82.23 | 14.63 | 
| 2012 | 96.14 | 81.63 | 14.51 | 
| 2011 | 95.71 | 81.25 | 14.46 | 
| 2010 | 95.46 | 81.04 | 14.42 | 
| 2009 | 103.57 | 87.31 | 16.26 | 
| 2008 | 102.35 | 86.29 | 16.06 | 
| 2007 | 102.29 | 86.21 | 16.08 | 
| 2006 | 102.27 | 86.15 | 16.12 | 
| 2005 | 102.05 | 85.80 | 16.25 | 
| 2004 | 101.97 | 85.66 | 16.31 | 
| 2003 | 100.63 | 85.36 | 15.27 | 
| 2002 | 100.25 | 84.71 | 15.54 | 
| 2001 | 100.20 | 84.71 | 15.49 | 
| 2000 | 103.72 | 84.60 | 19.12 | 
| 1999 | 102.91 | 84.34 | 18.57 | 

