当地人 (dāngdìrén) means "local people" or "locals." It is a compound word formed from 当地 (local) and 人 (person/people), referring to the residents or natives of a particular area.
当地人推荐我们去那家小饭馆。
dāngdì rén tuījiàn wǒmen qù nà jiā xiǎo fànguǎn.
The locals recommended that we go to that small restaurant.
这件事只有当地人才知道。
zhè jiàn shì zhǐyǒu dāngdì rén cái zhīdào.
Only the locals know about this.
当地人说这里冬天很少下雪。
dāngdì rén shuō zhèlǐ dōngtiān hěn shǎo xià xuě.
The locals say it rarely snows here in winter.