There are a number of "Shamrock" tokens.
These are often described as being "Irish"
Mostly USA plus a few from elsewhere.

I don't have any of these.
Some are listed elsewhere.

There are towns named Shamrock
in Texas and Kentucky (and probably elsewhere)

to top

 
Shamrock cut-out
 

A large number of US tokens (and some modern Irish souvenir coins)
have a shamrock shaped piercing to represent good luck.
I list only a few.

BRANCH

O: BRANCH
R: GOOD FOR 5¢ IN TRADE

Interstate Trading Co. Palouse, Wash.

John Hines

John Hines transit token - shamrock. A New England token issued by the John R. Hines Bus Co. and was Good For One Fare. Has a shamrock cutout in the center - brass

Modesto, Ca.

O: MISSION BILLIARDS MODESTO California
R: GOOD FOR 5 CENTS IN TRADE c21mm br

Watsonville, Cal

O: OWL RECR. PARLOR | 237½ MAIN ST.
R: GOOD FOR 5¢ IN TRADE 21mm WM - (Watsonville, Cal)

Tennessee State Prison

Madison Club

Cascade, Il.

O: J. A. ASCHTGEN / GAS, IA.
R: GOOD FOR 25c IN TRADE 24mm brass. Cascade, Iowa - error in the town name!

end of data