New to Django and even newer to ReactJS. I have been looking into AngularJS and ReactJS, but decided on ReactJS. It seemed like it was edging out AngularJS as far as popular
Hoping to provide a more nuanced answer than any of the ones here, especially as some things have changed since this was originally asked ~4 years ago, and because many of the top-voted answers claiming that you have to set this up as two separate applications are not accurate.
You have two primary architecture options:
These might look something like this:
Option 1 (Client/Server Architecture):
Option 2 (Hybrid Architecture):
The decision between these two will depend on your / your team's experience, as well as the complexity of your UI. The first option is good if you have a lot of JS experience, want to keep your front-end / back-end developers separate, or want to write your entire application as a React single-page-app. The second option is generally better if you are more familiar with Django and want to move quickly while also using React for some parts of your app. I find it's a particularly good fit for full-stack solo-developers.
There is a lot more information in the series "Modern JavaScript for Django Developers", including choosing your architecture, integrating your JS build into a Django project and building a single-page React app.
Full disclosure, I'm the author of that series.