Hong Kong is about 161 times smaller than North Dakota.

North Dakota is approximately 178,647 sq km, while Hong Kong is approximately 1,108 sq km, making Hong Kong 0.62% the size of North Dakota. Meanwhile, the population of North Dakota is ~672,591 people (6.6 million more people live in Hong Kong).
Tip: This to-scale comparison of North Dakota vs. Hong Kong uses the Mercator projection, which distorts the size of regions near the poles.