I have finally compiled and uploaded the county and congressional district results for the 2004 Iowa Caucus. Kerry is purple, Edwards is red, and Dean is green (with shades of each color representing the strength of the popular-vote win (in decades). The results are from the percentage listings at the Des Moines Register (It looks like the CNN data at the county level are wrong). Kerry and Edwards split the counties almost evenly with Kerry winning in three of the five congressional districts. Dean wins two counties - including Jefferson, the home of the University of Management (formerly Maharishi International University). This is the home county of John Hagelin of the Natural Law party, where he received 16% in 2000. There are several ties, noted by the striped shading - including a three-way tie between Dean, Edwards, and Kerry in Fremont County (located in the lower-left corner).
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