2018年NBA选秀在2018年6月24日在纽约布鲁克林区的巴克莱中心举行。届时，ESPN将向全美直播。 国家篮球协会（NBA）球队将轮流挑选美国大学篮球业余球员和其他符合资格的球员，包括国际球员。本次选秀将成为最后一次使用2005年的加权选秀抽签系统，新的规则将使得原本选秀顺位在后段的球队中签几率提高。这项规则已经在2017年9月28日的NBA联盟会议中通过，但将会到2019年选秀才会实施新方案。
2018年NBA选秀抽签于2018年5月15日举行。选秀的前14个签位归属于14支未能进入季后赛的球队参加；它们之间的选秀顺序是根据乐透抽签决定。乐透抽签会决定首轮前三个选秀名额的分配，首轮其他顺位以及第二轮选秀顺序都是按照前一个赛季中各队胜负记录逆序分配。
本次选秀是基于2011年联盟与球员工会达成的新劳资协议（Collective Bargaining Agreement，CBA）制定的规则下进行。在2011年停摆时期，该CBA的制定并没有立即修改选秀规则，不过该协议呼吁球员工会与联盟管理层建立一个委员会以商讨未来选秀可能发生的变化。本次选秀的基本资格规则如下所示。
所有参加本次选秀的球员必须在2015年至少年满19岁，也就是那名球员必须在1996年12月31日或更早的时候出生。只要不符合CBA规定的“国际球员”定义的球员，就至少要在那名球员高中毕业之后一年才可以参加选秀。但如果这名球员在美国外的任意国家居住超过三年，并拥有该地的永久居留权，并且没有完成在美国的高中学业且就读的大学不在美国或没有进入大学者，就被CBA定义为“国际球员”。
Players who are not automatically eligible have to declare their eligibility for the draft by notifying the NBA offices in writing no later than 60 days before the draft. For the 2018 draft, the date will fall on April 22. After that date, "early entry" players are able to attend NBA pre-draft camps and individual team workouts to show off their skills and obtain feedback regarding their draft positions. Under the CBA a player may withdraw his name from consideration from the draft at any time before the final declaration date, which is 10 days before the draft. Under current NCAA rules, player have until May 30 (10 days after the draft combine) to withdraw from the draft and retain college eligibility.
A player who has hired an agent forfeits his remaining college eligibility regardless of whether he is drafted.
下面仅列出未符合一般标准但自动获得选秀资格的球员——在劳资协议（CBA）下，国际球员需在选秀当年满22岁，若非国际球员则须高中毕业至少四年。
球员曾与NBA以外的职业篮球联盟球队签约，并在选秀前终止合同，则“可能”自动获得选秀资格。而这项资格是否符合端看该球员是否为国际球员：
在劳资协议下，公民权并非决定该球员是否要依照国际球员标准。在CBA的定义下，必须符合以下所有资格才能称为国际球员：
以下的球员将有资格参与2018年NBA选秀：
Prior to the day of the draft, the following trades were made and resulted in exchanges of draft picks between the teams. Link to official trades relating to the draft (regardless of whether picks become conveyed or not) is as follows: http://www.prosportstransactions.com/basketball/DraftTrades/Years/2018.htm（页面存档备份，存于互联网档案馆）
Boston acquired Gerald Wallace, Kris Humphries, Keith Bogans, MarShon Brooks, Kris Joseph, a 2014 first-round pick, a 2016 first-round pick, the option to swap 2017 first-round picks, and ;Brooklyn acquired Paul Pierce, Kevin Garnett, Jason Terry and D. J. White; Brooklyn also acquired Boston's 2017 second-round pick for compensation after the 2015–16 season ended.
Cleveland acquired Isaiah Thomas, Jae Crowder, Ante Žižić, , and the 2020 Miami Heat first round pick (latter pick added as compensation for Thomas' failed physical);Boston acquired Kyrie Irving
L.A. Lakers acquired Isaiah Thomas, Channing Frye and ; Cleveland acquired Jordan Clarkson and Larry Nance Jr.
Phoenix acquired 2013 first-round pick, 2013 second-round pick, 2014 second-round pick, and ;L.A. Lakers acquired Steve Nash
Philadelphia acquired from Phoenix;Phoenix acquired Brandon Knight and Kendall Marshall from Milwaukee;Milwaukee acquired Miles Plumlee and Tyler Ennis from Phoenix, Michael Carter-Williams from Philadelphia
L.A. Clippers acquired Avery Bradley, Tobias Harris, Boban Marjanović, and ;Detroit acquired Blake Griffin, Brice Johnson, and Willie Reed
Phoenix acquired Danny Granger, a 2021 unprotected first round pick, and a traded player exception from Miami, John Salmons from New Orleans;Miami acquired Goran Dragić and Zoran Dragić from Phoenix;New Orleans acquired Norris Cole, Shawne Williams, Justin Hamilton, and cash considerations from Miami
Chicago acquired Tony Allen, Jameer Nelson, Ömer Aşık, , and the rights to swap 2021 second round picks;New Orleans acquired Nikola Mirotić and
Phoenix acquired Greg Monroe, , and ;Milwaukee acquired Eric Bledsoe
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