Not nearly enough information. Dozens of different American coins have an eagle on the back; the "person" could be anyone from Miss Liberty to a president to Ben Franklin.
Please post a new question with more details - the coin's date, its mint mark if you can find it, its denomination, how worn it is, and a better description of the person.
The eagle is on the back. Susan B. Anthony is on the front.
On the front of the quarter is George Washington's face. On the back is an eagle (there is no person depicted for the reverse side).
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It's just a common Sacagawea dollar, spend it.
ALL U.S. coins have the back side inverted with respect to the front.
Is it a US coin, be more specific
How much is $5000 Estados Mexicanos dated 1938-1988 with an eagle holding a snake on the back worth in US money
That's called a Standing Liberty quarter. They were minted 1916-1930.
A denomination is needed, post new question.
Front: George Washington Back: Eagle
The woman is Susan B. Anthony, and the coin is still worth one dollar.
That's a Susan B. Anthony dollar coin, and it's worth one dollar.