Please tell us what date the coin is. Cents have been issued for over 200 years so there's lots to choose from.
No mint mark means it's from Philadelphia. It's worth exactly one cent.
With no mint mark, 25c to $5 depending on condition. With an S mint mark below the date, $1.50 to $33.
If it has a D mint mark it's worth 1¢ If it has an S mint mark, it WAS a proof coin worth about $1.40, but now that it's been removed from its Mint holder, it's lost most if not all of that extra value.
If it has a D mint mark it's worth 1¢ If it has an S mint mark, it WAS a proof coin worth about a $1.50, but now that it's been removed from its Mint holder, it's lost most if not all of that extra value.
Assuming you're referring to a U.S. cent, 5¢ to 25¢ depending on condition and mint mark.
a penny
It depends on the mint mark
The mint mark does not determine the value of a coin. If you have a penny and want to know what it is worth, please submit a new question and include the date on your penny as well as the mint mark.
It is worth face value.
A U.S. 1965 cent (not penny) was minted without a mint mark. It is a common coin. A 1965 Great Britain penny is worth 10 cents if uncirculated.
No mint mark means it's from Philadelphia. It's worth exactly one cent.
The coin is still in circulation today and is only face value
With no mint mark, 25c to $5 depending on condition. With an S mint mark below the date, $1.50 to $33.
1 cent, they are easily found in pocket change.
A 1910 penny: With no mint mark, good condition is worth $0.20, fine condition is worth $0.45, uncirculated is worth $14.00, Matte proof is worth $22.50. With S mint mark, good condition is worth $6.00, fine condition is worth $8.00, uncirculated is worth $85.00.
Depending on condition, it's worth 3-10 cents.
The coin is still in circulation today and is only face value.