Extant research suggests a link between child temperamental negativity and parental anxiety and depression. However, most studies focus on temperamental negativity generally, and over fairly short longitudinal time spans. The present study extended the time span well beyond immediate postnatal infancy and explored associations between specific child temperament dimensions, both positive and negative, and parental psychopathology. We expected positive relationships between temperamental negative affectivity and parental mental health problems, but an inverse relation involving temperamental effortful control. Data were collected on child temperament, and parental anxiety and depression, using a cross-sectional design and anonymous survey methodology across five child age groups: infancy (INF; 3 - 13 months, N ≅ 83), toddler (TOD; 14 - 36 months, N ≅ 94), early childhood (EC; 3 - 7 years, N ≅ 81), middle/late childhood (MLC; 8 - 10 years, N ≅ 31), and early adolescence (EA; 10 - 15 years, N ≅ 38). REDCap survey links were published on several dozen social media outlets and relevant listservs. Across all datasets, parental respondents primarily identified as white and female. Child gender distribution was approximately equal between girls and boys. We used the Rothbart family of instruments to assess temperamental negative affectivity and effortful control in each sample (i.e., IBQ-R Short Form, ECBQ Short Form, CBQ Short Form, TMCQ Standard Form, and EATQ-R Short Form, respectively). Parental anxiety was measured by the Generalized Anxiety Disorder Assessment (GAD-7), and parental depression was measured by the Patient Health Questionnaire-9 (PHQ-9). Associations involving child negative affectivity were generally consistent with expectations. Results indicated positive correlations between parental anxiety and child negative affectivity in 4 out of 5 groups (INF: r(83) = .25, p = .02; TOD: r(94) = .27, p = .01; EC: r(81) = .37, p < .001; EA: r(39) = .57, p < .001), and between parental depression and child negative affectivity in all age groups (INF: r(81) = .26, p = .02; TOD: r(91) = .22, p = .03; EAC: r(80) = .26, p = .02; MLC: r(30) = .42, p = .02; EAA: r(37) = .42, p = .01). Effortful control was negatively, but less robustly, correlated with parental anxiety (TOD: r(94) = -.22, p = .03; EAA: r(39) = -.44, p = .02) and depression (TOD: r(91) = -.29, p = .01; MLC: r(30) = .45, p = .01). Although we make no assumptions regarding directions of effect between child temperament and parental mental health, bidirectional influences seem likely. For example, parental mental health problems probably exacerbate temperamental negative affectivity, and temperamental negative affectivity probably exacerbates parental mental health problems. This study provides an important expansion of the timeframes of associations between parental mental health and child temperament.