Via POLITICO: Each circle represents the difference in votes between the winner and the runner-up in each one of Iowa’s 99 counties. Larger circles indicate a larger gap between the first- and second-place candidates.

Update (2/6): these results are based on 96.94% of all Iowa precincts, or 1711 out of 1765 total precincts; also, the percentage figures above (via Google) reflect the relative number of local delegates allocated to each candidate for Iowa’s statewide political convention (the farthermost column on the right), not the number of votes each candidate received in the Iowa caucuses.