Collins Chinese Dictionary Plus (3rd edition), 2011:
population [pɔpjuˈleɪʃən]
n
[c]
1
(=inhabitants) 人口 rénkǒu [个 gè]
2
▶ the male/civilian/elephant population 男性/平民/大象的数(數)量 nánxìng/píngmín/dàxiàng de shùliàng
- a prison population of 44,000
44,000名囚犯 sìwàn sìqiān míng qiúfàn