Using the General Social Survey data, I created the chart below to show the average family real income in 1986 dollars for each of the religions. Because of the GSS's relatively small sample size, large income buckets, and multi-year nature, the figures are only rough approximations.
Given the high correlation between being wealthy and being Republican, one would expect Jews to be the most Republican religion, but in fact they are the most Democratic religion, even more so than Baptists who come in a close second.
The people who created the GSS don't seem to think that Mormonism deserves mention as its own religion.
Religion Average family income Jewish 51,484 Episcopal 42,510 Presbytarian 39,715 Catholic 33,343 Lutheran 31,665 Methodist 31,229 Baptist 24,577