Diogo Lucas Queirós (born 5 January 1999) is a Portuguese professional footballer who plays as a centre-back or a defensive midfielder for Ligue 2 club Dunkerque.

[3] He made his debut as a senior on 27 August 2017, playing 90 minutes for the reserve team in a 1–0 home win against Santa Clara in the LigaPro.

[9][10] On 31 August 2021, Queirós moved to Spanish Segunda División side Real Valladolid on a one-year loan with an option to buy.

[17] He scored his first goal the following month, closing the 3–0 home win over Flora in the third qualifying round of the UEFA Europa Conference League.

[20][21][22] On 5 September 2019, Queirós won his first cap at under-21 level, scoring in the 4–0 win over Gibraltar for the 2021 European Championship qualifiers.