The European monitoring of excess mortality for public health action (EuroMOMO) network calculated the weekly and cumulative excess all-cause mortality estimates for European countries from the beginning of 2020 until May 3 rd (end of Week 18). All-cause excess mortality is defined as the observed mortality minus the expected mortality. This measure was used due to differences in testing and reporting strategies across European countries. Results showed that all-cause mortality was in excess or above normal levels in Italy around week 10 of 2020 (1-8 March), and then spread to Belgium, England, France, the Netherlands, Northern Ireland, Portugal, Scotland, Spain, Sweden, Switzerland and Wales in the next few weeks. Excess mortality peaked in Week 14 with a total of 88,581 deaths, before rapidly declining in Week 15. Additionally, after 18 weeks (185,287 deaths), 48% of excess mortality was in persons aged 85 or older, 30% in persons aged 75-84, 13% in persons aged 65-74, 8% in the 45-64 age group, and 1% in 15-44-year-old persons. Compared to past influenza seasons, there were steep increases in excess mortality for people aged 65 and above. The only age group to not experience excess mortality was those persons younger than 15. These results demonstrate that COVID-19 has had a significant impact on the majority of the European population and not just the elderly.