What is the rarest dollar in the US?

The rarest dollar in the US is often considered to be a high-grade collectable silver coin, specifically the uncirculated Silver Eagle Dollars. These coins, minted by the US Mint, are highly valued due to their limited supply, brilliant condition, and the demand from collectors and investors seeking long-term value. The 2012 edition, in particular, has gained notoriety for its scarcity and potential to appreciate in value.