维克里拍卖（Vickrey auction），即次价密封投标拍卖(Second-price sealed-bid auction)。投标者在不知道其他人标价的情况下递出标单，标价最高的人得标，但只需付次高的标价。虽然维克里拍卖早在1893年就被用在邮票的拍卖上，这种拍卖方式在学术上最早是由哥伦比亚大学教授威廉·维克里于1961年提出的。这类拍卖在策略上类似英式拍卖，且会让投标者有以实际价值出价的动机。

维克里的论文中原本是讨论单一、不可分的商品被拍卖的情况。只在此情况下，「维克里拍卖」和「次价密封投标拍卖」二词的意思是相等的，且可交替使用。不过，若拍卖商品是可分的，或为复数的，则这两个词的意思则不一样，不可混用。

A Vickrey auction is a type of sealed-bid auction. Bidders submit written bids without knowing the bid of the other people in the auction. The highest bidder wins but the price paid is the second-highest bid. This type of auction is strategically similar to an English auction and gives bidders an incentive to bid their true value. The auction was first described academically by Columbia University professor William Vickrey in 1961 though it had been used by stamp collectors since 1893. In 1797 Johann Wolfgang von Goethe sold a manuscript using a sealed-bid, second-price auction.