According to Word Crafter, a good topic for an informative essay is any topic that interests you, provides little-known information, is concisely explained and is supported by empirical evidence. Choose a topic of which you already know the basics.
Topics that you find interesting are easiest to research and write. New information keeps the reader engaged and the essay interesting. Most essays are between three and five pages, so the topic should be easy to explain in few words. Finally, the essay topic should have plenty of empirical, logical evidence available so that you can back up and reference every statement that you make in your paper.