You need to know the coin's date to have an idea of its value. But in any case most U.S. cents minted since around 1940 will be worth the same with no mint mark or a D, and maybe only a small amount more with an S. So many cents have been made every year since before WWII that very few of them have any significant collector interest.
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.
1930 Wheat penny: with no mint mark, in good condition is worth $0.10, uncirculated is worth $10.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth 25.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $13.00.
A 1914 penny with no mint mark is worth about $1.50.
1911 with no mint mark in good condition is worth $.20, uncirculated is worth $30.00, proof is worth $275.00.
1929 Wheat Penny; With no mint mark, in good condition is worth $0.15, uncirculated is worth $13.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth $32.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $18.00. More specifics are at the Related Link
a penny
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 depends on the mint mark
1930 Wheat penny: with no mint mark, in good condition is worth $0.10, uncirculated is worth $10.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth 25.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $13.00.
A 1914 penny with no mint mark is worth about $1.50.
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.
Yes. $1.25 if there is no mint mark, $7.75 if it has a D mint mark, and $132.50 if it has a S mint mark.
1911 with no mint mark in good condition is worth $.20, uncirculated is worth $30.00, proof is worth $275.00.
It is worth face value.
1936 Wheat Penny: With no mint mark, in very good condition is worth $0.10, uncirculated is worth $5.00, proof is worth $135.00. With D mint mark, in very good condition is worth $0.10, uncirculated is worth $8.00. With S mint mark, in very good condition is worth $0.10, uncirculated is worth $8.00.
1929 Wheat Penny; With no mint mark, in good condition is worth $0.15, uncirculated is worth $13.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth $32.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $18.00. More specifics are at the Related Link
1929 Wheat Penny; With no mint mark, in good condition is worth $0.15, uncirculated is worth $13.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth $32.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $18.00. More specifics are at the Related Link