Manhattan itself has around 1.6 million people, down from 2.3 million in 1910, while the Executor only runs with 50,000 souls. But while the ship is big enough to squash much of the city, it boasts a surprisingly small population for an area so large.
The picture provided shows the Executor stretching most of the length of Manhattan.
Fortunately, Redditor movielover278 is on hand to help out, transposing the vast vessel from the space around the forest moon of Endor down to the surface of Earth. While we see the former crash into the latter in Return of the Jedi, it's tough to tell exactly how big the ship - taken by Darth Vader as his personal flagship - was in real terms. The Super Star Destroyer Executor was, after the Death Star, Star Wars' second-biggest beast.
