No, 234,308,000 were struck at the Philadelphia Mint and will not have mintmarks.
The first Half dollar with any mint mark was from the New Orleans Mint in 1838.The mint mark is on the reverse under the eagle
The mint mark on a Barber Half Dollar is located on the reverse side right under the tail of the eagle.
The mint mark is on the reverse of the coin between the tail and the D in the word dollar.
No mint mark indicates that the coin was minted in Philadelphia.
It depends what it's made of...If it's from the San Francisco Mint and it's silver, it's probably worth at least $5.00. If it's from any other mint mark it's worth a dollar.
Check for a mint mark above the 1776-1976 date. If there's a D or no mint mark, your coin is made of copper-nickel, not silver, and is only worth face value. If there's an S you have a 40%-silver coin. Check the related question for more information.
The 1920 Half Dollar - aka - Liberty Walking - mint mark of "D" or "S" would be located on the reverse side, just to the left and above the "H" in half dollar.
The mint mark on Franklin half dollars is on the reverse side, just above the Liberty Bell.
The mint mark on a 1936 Walking Liberty half dollar is located on the reverse [tails] side of the coin in the little "valley" just to the left of the word "HALF" near the edge of the rim.
Not being certain which half dollar you have, I can tell you that there was never an "A" or a "N" mint mark. The letters you should find will be a "D", an "S", an "O", a "P" or a "CC"
On a 1941 U.S. half dollar, the mint mark is located on the reverse side of the coin, just below the eagle's tail feathers. It will be positioned to the left or right of the ribbon that holds the olive branches. Depending on the mint where the coin was produced, the mint mark can be either a "D" for Denver, an "S" for San Francisco, or no mark at all for the Philadelphia mint.
An uncirculated Philadelphia half from 1972 retails for about $1.