The objective of this work was to determine the level of anxiety and aggressiveness in graduate students from a private university in Lima; likewise, establish the level of association between the variables under study in the COVID-19 context. Methodology: quantitative approach, non-experimental descriptive cross-sectional design; population made up of 378 graduate students from the César Vallejo University (San Juan de Lurigancho, Lima-Peru Campus). Non-probabilistic sample of 203 doctoral students from the mentioned university. The instrument used to measure state anxiety and trait anxiety was the STAI “State-trait Anxiety inventory” and the Buss and Perry aggressiveness questionnaire (AQ). Results: 84.7% of the participants presented a high level of state anxiety, while 44.3% presented a trait anxiety above the average; on the other hand, 60.6% showed a low level of aggressiveness. The Chi-squared test showed a significant association between the variable state anxiety and aggressiveness at a confidence level of p = 0.008 ˂ 0.05; Likewise, the association between trait anxiety and aggressiveness showed a confidence level of p = 0.009 ˂ 0.05. Conclusions: As a consequence of the confinement caused by COVID-19, the levels of state anxiety and trait anxiety increased, which is probably associated with the increase in aggressiveness in its different variants.