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How Pete Buttigieg and Bernie Sanders split Iowa voters

After days of delay, 99.94% of Iowa's precincts have reported results from the Iowa Democratic caucuses. In the latest tally, former South Bend, Ind., Mayor Pete Buttigieg holds a narrow lead over Vermont Sen. Bernie Sanders.

Buttigieg

26.2%

Sanders

26.1%

Warren

18.0%

Biden

15.8%

Klobuchar

12.3%

% of state delegates

A closer look at the results shows that different areas and demographic groups pushed the two candidates ahead of the pack. Here's how it played out.

Go to full Iowa results »

Sanders in the cities, Buttigieg in the burbs

Buttigieg did well across the state, winning the Des Moines suburbs, a crucial battleground, and many smaller towns. Sanders’ victories were concentrated in more densely populated cities, like Des Moines and Cedar Rapids.

Margin of victory by county

Pete Buttigieg Bernie Sanders Elizabeth Warren Joe Biden Amy Klobuchar

Margin of victory

900 votes

500

100

Dubuque

Sioux City

Cedar Rapids

Iowa City

Des Moines

Sanders ran up big margins in large cities.

Buttigieg carried most rural areas and dominated some Des Moines suburbs.

Margin of victory

900 votes

500

100

Dubuque

Sioux

City

Cedar Rapids

Des Moines

Buttigieg carried most rural areas and dominated some Des Moines suburbs.

Sanders ran up big margins in cities and college towns.

Wealthier, older counties chose Buttigieg. The younger voters turned out for Sanders

Buttigieg won in counties across all levels of income, including the state's richest, Dallas and Warren.

Margin of victory

900 votes

500

100

Each circle is a county a candidate won

10

Median income

$40K$50K

$60K$70K

$80K

Buttigieg

Wealthy Des Moines suburbs

Buttigieg did well in counties of all income levels while Sanders did better in lower-income counties

Sanders

Iowa

Margin of victory

900 votes

500

100

10

Each circle is a county a candidate won

Median income

$40K

$50K

$60K

$70K

$80K

Buttigieg

Wealthy Des Moines suburbs

Sanders

Iowa

Buttigieg did well in counties of all income levels while Sanders did better in lower-income counties.

Sanders captured young voters, racking up votes in the big college towns. Buttigieg swept most of the older counties.

Median age

30 years

35

40

45

Buttigieg did well in older counties

Buttigieg

Sanders

Iowa

Story County, home to Iowa State University

Median age

30 years

35

40

45

Buttigieg

Buttigieg did well in older counties.

Sanders

Iowa

Story County, home to Iowa State University

Second round boosted Buttigieg

With 99.94% of precincts reporting, Bernie Sanders has received the most raw votes in both rounds of voting, but a boost in the second round has given Pete Buttigieg a narrow lead in state delegate equivalents.

What about the rest?

Elizabeth Warren won only Johnson County, home to Iowa City and the University of Iowa, but finished third thanks to her support across cities.

Former Vice President Joe Biden, a onetime favorite to capture the Hawkeye State, did well in a scattering of rural precincts. He failed to garner enough support to perform to his campaign's expectations.

Amy Klobuchar ultimately came in a close fifth, gathering some support mainly in the northern counties bordering her home state, Minnesota.

The other candidates collectively did not win more than 10% of the vote in any of the state's 99 counties.

Share of total vote by candidate

Sanders

0

50%

Dubuque

Sioux City

Cedar Rapids

Des Moines

Iowa City

Buttigieg

0

50%

Warren

0

50%

Biden

0

50%

Klobuchar

0

50%

Everyone else

50%

0

Up next:

  • Feb. 11: New Hampshire primaries
  • Feb. 22: Nevada Democratic caucuses
  • Feb. 29: South Carolina Democratic primary
  • March 3: Super Tuesday: Democratic primaries for Alabama, Arkansas, California, Colorado, Democrats Abroad, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, Utah, Vermont, and Virginia