William Pope McArthur | |
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| Born | April 2, 1814 Ste. Genevieve, Missouri |
| Died | December 23, 1850 (aged 36) At sea |
| Service | United States Navy |
| Years of service | 1832–1850 |
| Rank | Lieutenant commander |
| Unit | U.S. Coast Survey |
| Commands | USS Consort US survey schooner Ewing |
| Battles / wars | Second Seminole War |
| Relations | Clifton N. McArthur & Lewis Linn McArthur (sons), Lewis A. McArthur (grandson), Lewis L. McArthur (great grandson) |
William Pope McArthur (April 2, 1814 – December 23, 1850) was an American naval officer and hydrologist who was involved in the first surveys of the Pacific Coast for the United States Coast Survey.