Background: Historically, perinatal depression has predominantly focussed on the mother-baby dyad, often neglecting the crucial role of fathers. Aim: To determine the prevalence and associated factors of depressive symptoms in the immediate puerperium (PDS) in both mothers and fathers, individually and concurrently. Method: This study employed a cross-sectional design. The presence of PDS was assessed using the Edinburgh Postnatal Depression Scale (EPDS), with a cut-off score of ⩾11 for mothers and ⩾9 for fathers. Logistic regression analyses were conducted to identify factors independently associated with PDS. Robustness of findings was verified through sensitivity analyses among participants without prior psychiatric conditions. Results: Among 1,502 partnered mothers and fathers aged ⩾18 years who met the inclusion criteria, PDS were present in 13.0% of mothers, 10.5% of fathers and 3.5% of both parents. Mother-baby skin-to-skin contact and the father’s pregnancy planning were associated with a lower likelihood of PDS in mothers. For fathers, financial difficulties increased the likelihood of experiencing PDS threefold. The presence of PDS in mothers quadrupled the likelihood of PDS in fathers, and vice versa; their EPDS scores demonstrated a moderate correlation ( rs = .38). Among participants without prior psychiatric conditions, the odds of co-occurring PDS nearly tripled if the mother had a history of abortion or miscarriage. Fathers who had increased potentially addictive behaviours showed a six-fold increase in the likelihood of experiencing PDS. Conclusions: Identifying depressive symptoms in both parents and incorporating fathers into clinical practice, research and health policy could enhance mental health outcomes in vulnerable populations.