If it was found in change, 1 cent.
If it's a proof or uncirculated coin in its original holder it's worth about a quarter.
In order to give an estimate of the value of a penny, the mintmark and the date are needed. There are many, many "S" mint pennies, each with its own value.
It will have a S mintmark.
It's very common, values are 3 to 10 cents for circulated coins.
The mintmark is a "S" or "D" they are the ones used on the 1943 Lincoln steel cents. Average value is 5 to 10 cents.
For a Lincoln cent, any mintmark is under the date on the obverse. Indian Head cents have the mintmark on the reverse under the wreath and can only be an "S" mintmark, on just on the 1908 & 1909 issues.
The close AM 1998 varieties are only proof issues, so the coin should have an "S" mintmark. Take it to a coin dealer for an assessment.
If it is a proof then it will have the mintmark "S". If your coin doesn't have the mintmark "S" then it is just a normal coin.
Look on the back below the DO in DOLLAR. It could be black or there could be a small O, S, or CC mintmark. Value as of June 2012: No mintmark:$52 "O" mintmark:$156 "S" mintmark:$52 "CC" mintmark:$540
Because the "S" mintmark means the coin was minted in San Fransisco. Because the coins minted in San Fransisco in 1976 were not intended for circulation, they are more desirable to collectors. Some of the "S" mintmark coins are 40% silver and that boosts their value. If the coin has no mintmark, or any other mintmark other than "S" it has no value beyond face value.
It is worth 1 cent unless it carries the mintmark "S".
The mintmark can't be an "S" only a "D" the San Francisco Mint struck no coins after 1955 until 1968. As for value maybe 3 cents for a circulated coin and 25 cents for uncirculated.
It is worth a penny