4-Digits (abbreviation: 4-D) is a lottery in Germany, Singapore, and Malaysia. Individuals play by choosing any number from 0000 to 9999. Then, twenty-three winning numbers are drawn each time. If one of the numbers matches the one that the player has bought, a prize is won. A draw is conducted to select these winning numbers. 4-Digits is a fixed-odds game.

Magnum 4D is the 1st legalised 4D Operator licensed by the Malaysian Government to operate 4D. Soon thereafter, other lottery operators followed suit, as this is a very popular game in Singapore and Malaysia. The recently launched Daily Derby 4D Blue and Green and 5D jackpots of WTL-M is also growing popular now. Singapore Pools is the sole provider of gambling games in Singapore. 4-D and lottery 6/49 are two of the most popular. A similar 4-D game with its prize structure fully revealed can be found in Taiwan.

4-Digits is somewhat similar to "Pick 4" in the United States, Canada 5-Digits "Pick 5", and Jackpot in Germany and Malaysia.