How much is a 1968 D Lincoln Kennedy penny worth?

So very common that high grade mint state coins have retail values of 25 cents. Spend it.

How much is a 1968 kennedy silver half dollar worth

In uncirculated condition, about five cents. 1968 pennies in circulated condition are only worth face value.

They're worth about two cents each for the copper.

If it's after the 1950s with an S mint mark, that makes it a proof coin. A '68-S might be worth a dollar or so as long as it's still in mint condition. Not all S mint 1968 Lincoln cents are proof. The San Francisoc Mint made business strike Lincoln cents from 1968 thru 1974. The 1968-S Lincoln cents released into circulation are considered common and still found in circulation today. Uncirculated examples are less…

They aren't. 1967 and 1968 pennies both have very high mintages and are in common circulation, they are only worth a penny.

About 2 cents, due to copper content.

in bad shape, worth its face value, proof and uncirulated 1 dollar at best

Kennedy half dollars minted between 1965 and 1970 contain 40% silver and are worth a little less than $5 each.

The US Mint in New Orleans ceased the production of coins in 1909. A 1968 Lincoln penny with an "O" as mintmark would have to be counterfeit or an authentic coin which has been altered to show the "O" mintmark. Either way it has no true numismatic value.

Kennedy half dollars from 1965 to 1969 are 40% silver with a value of $1.25

1965-1970 Kennedy halves are only 40% silver. Most are valued for just the silver, about $4.50.

Robert F. Kennedy and Martin Luther King were both assassinated in 1968. One hundred years earlier Abraham Lincoln was assassinated

If this question is about the coin's value, it's worth about $4.50 for its silver content.

In 1968 the Kennedy half dollars were still struck in 40% silver so it has the silver value only, about $2.50. The gold plating was NOT done at the Mint and adds nothing to the value.