Is San Diego Bigger Than Rhode Island? No

No. Rhode Island (state) is far larger than San Diego (city).

• Rhode Island land area: 1,544 sq mi (4,001 km²)
• San Diego land area: 379 sq mi (982 km²)

Rhode Island is ~4 times larger. The comparison is a common misconception because both are associated with coastal geography, but one is a state (smallest in the U.S.) and the other a major city.