Is there anything that is worth less than a Penny?

Answer 1

In most of the British Empire/Commonwealth countries using the now obsolete predecimal Pounds, Shillings and Pence currency, the Halfpenny was the lowest denomination of coin.

Some countries including Britain used a Farthing (quarter Penny) and a variety of fractional Farthing denominations such as a Half, Third or even Quarter Farthing.

Answer 2

In some countries, there are coins with values lower than a penny, such as the half-cent in the United States, which is no longer in circulation. Additionally, some currencies have coins worth even less than a penny, like the Japanese yen's 1 yen coin.