Now that almost all Iowa precincts have reported, I've enclosed more detailed results from the four Congressional races after the jump. All numbers come from this page on the Iowa Secretary of State's website.
According to unofficial results from all precincts, Bruce Braley defeated Ben Lange by 217,428 votes to 160,099 (56.72 percent to 41.77 percent). Two minor candidates received a little more than 5,500 votes between them.
Braley carried 17 counties: Allamakee, Benton, Black Hawk, Bremer, Buchanan, Clayton, Dubuque, Fayette, Howard, Jackson, Jones, Linn, Marshall, Poweshiek, Tama, Winneshiek, and Worth
Lange carried three counties: Delaware, Iowa, and Mitchell
According to unofficial results from 379 out of 401 precincts (20 more precincts have partially reported), Dave Loebsack defeated John Archer by 203,732 votes to 158,059 (55.21 percent to 42.83 percent). A third-party candidate received 6,914 votes.
Loebsack carried 15 counties: Appanoose, Cedar, Clarke, Clinton, Davis, Decatur, Des Moines, Jasper, Jefferson, Johnson, Lee, Muscatine, Scott, Wapello, and Washington
Archer carried nine counties: Henry, Keokuk, Louisa, Lucas, Mahaska, Marion, Monroe, Van Buren, and Wayne
According to unofficial results from all precincts, Tom Latham defeated Leonard Boswell by 201,457 votes to 167,965 (52.25 percent to 43,56 percent). Two other candidates received about 15,500 votes between them.
Latham carried 15 counties: Adair, Adams, Cass, Dallas, Fremont, Guthrie, Madison, Mills, Montgomery, Page, Pottawattamie, Ringgold, Taylor, Union, and Warren
Boswell carried Polk County, but only by 4,192 votes. President Barack Obama carried Iowa's largest county by 32,235 votes.
According to unofficial results from all precincts, Steve King defeated Christie Vilsack by 199,467 votes to 168,323 (53.04 percent to 44.76 percent). A third candidate received 8,067 votes.
King carried 32 counties: Audubon, Buena Vista, Butler, Calhoun, Carroll, Cherokee, Clay, Crawford, Dickinson, Emmet, Franklin, Greene, Grundy, Hamilton, Hancock, Hardin, Harrison, Humboldt, Ida, Kossuth, Lyon, Monona, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Shelby, Sioux, Woodbury, and Wright
Vilsack carried seven counties: Boone, Cerro Gordo, Chickasaw, Floyd, Story, Webster, and Winnebago