State size comparison
Massachusetts is about 20 times smaller than California.
California is approximately 403,882 sq km, while Massachusetts is approximately 20,306 sq km, making Massachusetts 5.03% the size of California. Meanwhile, the population of California is ~37.3 million people (30.7 million fewer people live in Massachusetts).
This to-scale comparison of California vs. Massachusetts uses the Mercator projection, which distorts the size of regions near the poles. Learn more. Note: Try dragging the outline to reposition.