Diogo Lucas Queirós (born 5 January 1999) is a Portuguese professional footballer who plays for F.C. Famalicão as a central defender.
Born in Matosinhos, Porto District, Queirós joined FC Porto's youth system at the age of 11 from local club Leixões SC. 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 C.D. Santa Clara for the LigaPro. The previous June, he had renewed his contract until 2021.
On 27 August 2019, Queirós was loaned to Royal Excel Mouscron of the Belgian First Division A. His maiden appearance in the competition took place three days later, in a 2–2 away draw to KV Mechelen. He played 21 total games during his spell, and scored in a 2–0 home victory over K.V. Kortrijk on 15 September.
Queirós signed a three-year deal with F.C. Famalicão on 6 October 2020. He appeared in his first Primeira Liga match on 7 November, starting and finishing the 2–1 home defeat of C.S. Marítimo.
