Mario Party: The Top 100 is a 2017 party video game developed by NDcube and published by Nintendo for the Nintendo 3DS. It is the fifth handheld game in the Mario Party series, as well as the third and final Mario Party game to be released for the 3DS. Announced during a Nintendo Direct in September 2017, the game was first released in North America in November 2017, and was released in PAL regions and Japan in December 2017.

Mario Party: The Top 100 is primarily a compilation of 100 minigames from across the Mario Party series, specifically ones from the home console installments. The game offers several game modes centered around playing minigames, including a mode that sees traditional Mario Party gameplay with up to four characters from the Mario franchise, each controlled by either a human player or artificial intelligence, competing in an interactive board game.

Mario Party: The Top 100 received mixed reviews, with general praise for its premise as a minigame compilation and criticism toward its lack of content aside from the minigames. A similar entry, Mario Party Superstars, which also features 100 minigames from the home console games, was released for the Nintendo Switch in 2021.

Mario Party: The Top 100 is a party video game that is a compilation of 100 minigames that were introduced in the first 10 Mario Party games for home consoles. Most of the minigames received upgraded graphics and audio, and several minigames that appeared in Mario Party games for the Wii were reworked to properly function on the Nintendo 3DS, which lacks the Wii's motion controls. The game boasts eight playable characters: Mario, Luigi, Princess Peach, Princess Daisy, Wario, Waluigi, Yoshi, and Rosalina. These characters can be controlled by human players as well as artificial intelligence (AI).

Mario Party: The Top 100 features game modes in which Toad or Toadette guides the players. In the Minigame Match mode, players roll dice to move around a single game board simultaneously, with the goal being to collect the most Stars by the end of a board game, as in prior Mario Party titles. Players earn one Star for every ten coins collected, which in turn can be earned from minigames. Items on the board can be collected and used to help players gain an advantage over their opponents. Unlike in previous Mario Party installments, rather than automatically being played at the end of every turn, minigames are played whenever certain items are used or a player pops a Minigame Balloon.

Another game mode, Minigame Island, revolves around playing through preselected minigames to advance along a linear path, with the player occasionally facing off against Bowser, Donkey Kong, or another non-playable character in a minigame, culminating in a duel against Bowser at the end of the campaign. Playing through Minigame Island is required for unlocking several dozen of the minigames. Completing this mode for the first time unlocks a harder challenge mode, and collecting every Star by getting first place unlocks the hardest computer-controlled character difficulty level, "Master". The Championship Battles mode involves playing three or five minigames from a selected pack, with the player(s) winning the most minigames being declared the winner(s), while the Decathlon mode consists of playing five or ten minigames to earn the most points. Mario Party: The Top 100 also includes a "free play" mode, wherein players can choose which minigames to play. Additionally, the game features a collection menu, where players can listen to music and view characters from the Mario franchise.

Despite lacking an online multiplayer option, Mario Party: The Top 100 supports local multiplayer for up to four players through the use of either individual copies of the game or the 3DS's Download Play functionality, with only one player being required to have a copy of the game. The Top 100 also has Amiibo compatibility, allowing players to unlock minigames quicker and receive assistance during rounds, as well as obtain coins and acquire an extra life after a game over.

Mario Party: The Top 100 was developed by NDcube and published by Nintendo; the latter announced the game on September 13, 2017, during a Nintendo Direct. Some reviewers initially expressed disappointment with the game not also being available on the Nintendo Switch, which GameSpot's Chris Pereira stated "would seemingly be a perfect fit". An overview trailer was released the following month.