The population of Preston increased by 1% between 2013 and 2018, according to the latest available figures from the Office of National Statistics (ONS).
South Ribble saw similar population growth with an increase of 1.57% between 2014 and 2019.
While Chorley has seen the biggest population rise since 2014, with a 5.92% increase.
But some Preston, Chorley and South Ribble wards have seen the population explode over the last five years of available data.
These are the 10 Preston, Chorley and South Ribble areas where the population increased by more than 10% over five years (Images are for illustration purposes only):
9. Clayton-le-Woods West and Cuerden - Chorley
The population of Clayton-le-Woods West and Cuerden in Chorley increased by 24.63% from 2014 to 2019. The average growth in the area was 5.92%. Photo: Google
10. Astley and Buckshaw - Chorley
The population of Astley and Buckshaw in Chorley increased by 31.01% from 2014 to 2019. The average growth in the area was 5.92%. Photo: Google