Name one of the two longest rivers in the United States.

Answers from the USCIS list

Give one of these answers. Words in light (parentheses) are optional.

• Missouri optional: (River)
• Mississippi optional: (River)

Our explanation

The two longest rivers in the U.S. are the Mississippi River and the Missouri River. The Mississippi runs north to south through the middle of the country. The Missouri River connects to the Mississippi. Name either one.

Remember it

Both start with “Miss”: Mississippi and Missouri.

Source

USCIS 2025 Study Guide (M-1175) p. 41: “The two longest rivers in the U.S. are the Mississippi River and the Missouri River. The Mississippi River runs north to south…”

• Civics (History and Government) Questions for the Naturalization Test (2008 version), rev. 08/21 (PDF, USCIS)

Last checked on September 29, 2026.

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