On July 23, the WHO declared the rapidly spreading monkeypox epidemic a Public Health Emergency of International Concern (PHEIC). This study attempted to assess the knowledge, attitude, and anxiety levels of the general population during the monkeypox outbreak. An online cross-sectional survey was conducted during the period July 27 and July 30, 2022, using a convenience sampling method. The questionnaire was adapted and developed after an in-depth review of the previous studies. A total of 510 respondents participated in this study. 277 (54.3%) were male, 233 (45.7%) were female. Participants had insufficient knowledge of MPX with a mean and SD deviation 2.096 ± 1.359, 2.576 ± 1.466, having a normal attitude toward MPX 4.031 ± 1.645. Moreover, they had anxiety problems 32.382 ± 10.094. There were significant differences in the mean rank scores of the knowledge of respondents about MPX according to their gender, marital status, religion, level of education, and place of residence, with p-values of 0.009, 0.000, 0.000, 0.000, and 0.000, respectively. Also, there were significant differences in the mean rank scores of attitudes of respondents toward MPX according to their gender, level of education, place of residence, and age, with p-values of 0.011, 0.020, and 0.000, 0,029, respectively. Lastly, there were significant differences in the mean rank score of anxiety of respondents toward MPX according to their gender, marital status, religion, level of education, and place of residence, with p-values of 0.000, 0.009, 0.000, 0.000, and 0.000 respectively. There is an urgent need to raise public awareness and manage people's emotional wellbeing.