| Rank | City | 1940 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | St. Louis | 816,048 | -0.1% |
| 2 | Kansas City | 399,178 | -0.0% |
In 1940, the largest city in Missouri was St. Louis, with a population of 816,048. The second largest city is Kansas City, with a population of 399,178.
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