1st Division (Portugal)

1ª Divisão do CEP
1st CEP Division
Active1917–1919
Country Portugal
AllegiancePortuguese Army
BranchArmy
TypeDivision
RoleInfantry
Size25 000
HeadquartersLestren, France
EngagementsWorld War I
Commanders
Division commanderGeneral Gomes da Costa

The 1st Division was one of the two divisions of the Portuguese Expeditionary Corps (CEP, Corpo Expedicionário Português), the main military force of Portugal that fought in the World War I Western Front on the side of the Allies. The Division was under the command of General Gomes da Costa, during most of its existence.