There was a 35 per cent drop in attendance within the US Episcopal Church between 2020 and 2021 according to a Parochial Report released last week.
The number of people giving to the church however had increased.
The study called 'Exploring the Pandemic Impact on Congregations: Innovation amidst and beyond Covid-19' shows the impact the Covid-19 pandemic had on congregations within that time.
Speaking to the Church Times, the Presiding Bishop of the Episcopal Church, Most Rev Michael Curry, said: "I empathise with the feelings of concern many may feel after reading this data, and yet it is important to remember that the institutional Church as we know it has not been the form that Christianity has always taken.
"The essence and core of the Church is not its outward form, which would always change over time. The essence and core is Jesus Christ, his Spirit, his teachings, his manner of life, his way of love and the movement he founded cannot be stopped.
"We need our church leaders, both ordained and lay, to embrace this moment of reinvention, and the folks I see rising up are going to bring us into a profoundly different age."
Within the Episcopal Church the figures showed the average attendance for Sunday worship dropped from 458,179 in 2019 to 292,851 in 2021.