Despite recent research interest in switching among American denominat
ions, the fact remains that the majority of church members never chang
e denominations. Further, when Americans do switch, they often remain
within the same broad denominational family. Thus, this paper examines
denominational mobility (switching) with a focus on stability. The fi
rst half of the paper examines changing patterns of denominational mob
ility from 1973 to 1990. In summary, we found that: (1) switching, in
general, has increased but switching between denominational families h
as not, (2) patterns of stability and net gains and losses through swi
tching reflect broad denominational membership trends; and (3) disaffi
liation remains high while rates of disaffiliation have fallen. The se
cond half of the paper looks at correlates of stability at the individ
ual level: why people stay or switch. The data show that consistent so
cialization (and marriage) within a single denominational tradition re
stricts switching more than any other set of factors.