This is a population in which the number of the elderly (older people) is increasing significantly. One major reason for the increase is that the people are living longer. Other reasons include the people in that population are getting married later and having fewer children. In addition, advancements and improvements in healthcare and medical technology have also contributed to a greying population in some regions.

     
Dalam populasi begini, bilangan penduduk tua adalah tinggi berbanding dengan populasi lain. Satu faktor utama peningkatan bilangan penduduk tua adalah kerana manusia hidup lebih lama. Faktor-faktor lain termasuk perkahwinan lewat, bilangan anak yang mengurang dan perkembangan dalam perkhidmatan penjagaan kesihatan dan teknologi perubatan.