Type 'easy' or 'hard' to begin the quiz. Easy is a 5-degree grid, hard is a 2.5-degree grid. The grid will be randomly placed on the map. Then, try to name the largest cities in each square IN ORDER. To name a city, you must first click on the grid square to make it have a GREEN border. Then, type in the city answer for that square followed by a '.' (a period).
The squares will start with '0/5' (or maybe fewer cities if less exist in that square). Click on a square and enter the largest city in that square not yet answered (so, the largest city if you have yet to answer a city in that square). You will then have '1/5' and need to click on that square to name the 2nd largest city, and so on until you complete all the cities up to 5 (or less if less exist). If you name an incorrect city in a square it becomes 'locked' and turns red and you can no longer accumulate cities in that square.
You receive 1 point for the largest city in a square, 2 for the 2nd largest, and so on.
AK and HI are NOT included in this quiz.
At the end of the quiz the largest remaining city you haven't named will be shown in each square.
Quiz Takers 
A note: if one place is completely contained within another and you name the larger place, the interior place will also shade in, but you still will need to name it. This is rare but I don’t have a way around it.
Tried New Hampshire and it’s missing a ton of towns
This is what the census has on their site as far as boundary files.
Would it be possible to create a quiz that allows you to name all of them without having to go by state?
https://hugequiz.com/quizzes/us-largest-census-designated-places/