The Guide was created by SergiuHellDragoonHQ . Make sure to support him, he will LOVE it! :)
Check out his YouTube Channel
Check out his Facebook Page[www.facebook.com]
Follow him on Google+[plus.google.com]
Follow him on Twitter

A big thank you and a big hug from Sergiu, just for you! >:D<

What you are going to read from now on is the easy way to get 1 million population, by using mods. The hard way would be to successfully manage your town to make your people happy and increase the land value.

To reach 1 Million people you will need the following 3 mods and more than 10 hours of waiting ( with 3x speed ) to reach the population limit:

• Maximum Demand ( Download from Steam )
  This mod will fully increase the Demand for Rezidential, Commercial and Industry zones, therefor people will continuously come to your city untill they fill all the houses or you reach 1 million citizens.
  Even if you have this mod, is not enough, you will need the 3rd mode if you want to really reach the 1 million population.
  
  
• Disable Abandonment ( Download from Steam )
  
  This mod will stop your citizens from abandoning the building. I don&#39;t think this mode is 100% necessary for you to reach 1 million citizens but I think it&#39;s very good to have it there.
  
  
• All 25 Areas Purchasable ( Download from Steam )
  This mod will allow you to buy more terrain and if you have more terrain you will have more space to build houses therefor you will be able to house more people, that is why this mod is very important and you MUST use it with the first mod if you want to reach 1 million population.

This is pretty much everything you need guys. I hope it helps you understand how things work.

(you can find the very same guide on my website: http://www.sergiuhelldragoon.com/strategy-games/cities-skylines/guides/get-1-million-population )