According to Hindu scriptures, after Brahma created the first humans and decided to populate the earth with early human settlements, in which geographical location did he put them. I want to know the name of the place for example Kailash mountain or Ayodhya or where? Any supporting text from scriptures would be helpful.
The first humans were Swayambhu Manu and Devi Shatarupa. And their abode was Brahmavarta. So, their kingdom should be the 1st human settlement on earth.
According to ManuSmriti 2.17-19.:
The land created by the gods and lying between the divine rivers Saraswati and Drishadwati is called 'Brahmavarta' - the region of Brahman. The conduct handed down from generation to generation among the social classes and the intermediate classes of that land is called the 'conduct of good people'. Kuruksetra and the lands of the Matsyas, Pancalas, and Surasenakas constitute the 'land of Brahmin seers', which borders on the Brahmavarta. All the people on earth should learn their respective practices from a Brahmin born in that land.
I hope this clarifies your queries.