Denver, Colorado.
It was struck at the US Mint at Denver Colorado - D for Denver.
Assuming you mean Wheat penny's, the 1909-S V.D.B., 1914-D & 1931-S are the icons of the series.
A letter D just below the date is the mint mark for Denver.It is called a mintmark, and it signifies where the coin was minted.
The "D" on coins mean that it came from the Denver Mint.
A "D" on a US coin indicates that it was minted at the Denver Mint.
The D stamp has a face value of 22 cents and can be used on domestic mail at that value.
The 1962-D Lincoln Cent {penny} was minted at the US Mint in Denver, Colorado, USA.
Franklin Roosevelt was noted as a stamp collector.
3 cents.
The letter D means it was minted at the Denver Mint.
it was made in denver, at the denver mint