2018–19 S.L. Benfica season

The 2018–19 season was Sport Lisboa e Benfica's 115th season in existence and the club's 85th consecutive season in the top flight of Portuguese football. It started with the UEFA Champions League third qualifying round on 7 August 2018 and concluded on 18 May 2019 with Benfica becoming Primeira Liga champions for a record 37th time.

Internationally, Benfica played in the Champions League group stage for the ninth successive time, a Portuguese record ranking fourth all-time. However, with two losses at Estádio da Luz, they set a domestic record of five consecutive home matches without a win in the competition. After finishing third in their group, they moved to the UEFA Europa League knockout phase, where they reached the quarter-finals.

Appearances and goals
! colspan=16 style=background:#dcdcdc; text-align:center|Goalkeepers

! colspan=16 style=background:#dcdcdc; text-align:center|Defenders

! colspan=16 style=background:#dcdcdc; text-align:center|Midfielders

! colspan=16 style=background:#dcdcdc; text-align:center|Forwards

! colspan=16 style=background:#dcdcdc; text-align:center|Players who made an appearance and/or had a squad number but left the team


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Technical staff
{| class="wikitable" ! Position ! Name Minervino Pietra Marco Pedroso
 * Head coach
 * Bruno Lage
 * Assistant coaches
 * Nélson Veríssimo
 * Assistant coaches
 * Nélson Veríssimo
 * Video analyst
 * Jhony Conceição
 * Fitness coach
 * Alexandre Silva
 * Goalkeeping coach
 * Fernando Ferreira
 * Goalkeeping coach
 * Fernando Ferreira
 * Fernando Ferreira

Pre-season friendlies
On 15 May 2018, Benfica announced their pre-season schedule (updated on 28 June), which included the following matches:

Taça de Portugal
Benfica were eliminated on away goals.

Third qualifying round
Benfica won 2–1 on aggregate.

Play-off round
Benfica won 5–2 on aggregate.

Round of 32
Benfica won 2–1 on aggregate.

Round of 16
Benfica won 3–1 on aggregate.

Quarter-finals
Benfica were eliminated on away goals.