Nineteen percent of all adult Americans consider themselves Pentecostal or charismatic Christians, according to a Gallup Poll taken for the evangelical magazine Christianity Today.
The survey found that of these 29 million persons, about one-fourth are Roman Catholics and two-thirds Protestants.
The number of Protestant charismatics paralleled the size of their denominations, with Baptists constituting 21 percent, Methodists, 8 percent, Lutherans 6 percent and Presbyterians 4 percent.
Of the total number of charismatics, about one-sixth -- 5 million -- say they have spoken in tongues. One-tenth of Catholic charismatics said they had spoken in tongues, and one-fifth of the Protestants.
In an article analyzing the survey findings, Christianity Today Editor Kenneth S. Kantzer noted that the terms "charismatic" and "Pentecostal" are used by people to designate many different phenomena.
"In contemporary English, the word [charismatic] is sometimes used in religious context to refer to those Christians in denominations holding that speaking in tongues and other supernatural gifts are normative for the church today [usually called 'classical Pentecostals' or simply 'Pentecostals']" he wrote.
But Kantzer said that "the term 'charismatic' [or less frequently, neo-Pentecostal] is often distinguished from 'Pentecostal' by restricting its reference to those within more traditional denominations who exercise or value tongues and other extraordinary gifts as a normal part of contemporary Christian experience."