One of the crucial services the Rev. Tony Marr provides as leader of the Higher Ministries consulting firm is to connect young pastors -- fresh out of seminaries and Bible colleges -- with churches that need new leaders.

But there's a problem. Most of these churches seeking pastors have fewer than 150 members and are considered "small churches" in the Protestant marketplace. Many of them have around 50 active members or less. It takes about 80 to 90 active members, in most church traditions, to pay a full-time pastor's salary.

"This is a conversation I have almost every week," said Marr, who is based in Johnson City, Tennessee. "At any given time, we have three or four small churches looking for pastors. … It seems like nobody wants to go to those small churches. Nobody wants to serve God there."

When Marr asks young pastors to describe their ideal "first job," most say that they want to serve as an associate pastor on the staff of a truly large church -- one with 1,000 members or more. In other words, they want to prepare to lead churches of that size, or larger.

"They have no intention of taking a church with 45 or 50 or 60 active members," he said, reached by telephone. "Many of these young pastors would rather work in coffee shops than lead that kind of church, even if these jobs would let them preach several times a week while ministering to real people and real families. They would rather work part-time, or be volunteers, at the large churches that they see in their futures."

This is a crisis that denominational leaders will have to face, he explained, for a simple reason. A recent survey from Faith Communities Today (.pdf) found that seven out of 10 American congregations have fewer than 100 people attending their main worship services. The average church has 65 members in the pews on Sunday. Digging deeper, in some denominations -- especially shrinking mainline bodies -- most congregations struggle to pay full-time salaries.

Backing that up, a Baptist Press report stressed that the "most recent National Congregations Study (NCS) found the median congregation in the U.S. welcomes 70 regular participants, including adults and children, and has an annual budget of $100,000."