| Election Name: | 2004 Iowa Senate election |
| Country: | Iowa |
| Flag Image: | Flag of Iowa (variant).svg |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2002 Iowa Senate election |
| Previous Year: | 2002 |
| Next Election: | 2006 Iowa Senate election |
| Next Year: | 2006 |
| Seats For Election: | 25 out of 50 seats in the Iowa State Senate |
| Majority Seats: | 26 |
| Election Date: | November 2, 2004 |
| Leader1: | Jeff Lamberti |
| Party1: | Republican Party (United States) |
| Leaders Seat1: | 35th |
| Seats Before1: | 29 |
| Seat Change1: | 4 |
| Seats After1: | 25 |
| Leader2: | Michael Gronstal |
| Party2: | Democratic Party (United States) |
| Leaders Seat2: | 50th |
| Seats Before2: | 21 |
| Seat Change2: | 4 |
| Seats After2: | 25 |
| Map Size: | 350px |
| President of the Senate | |
| Before Election: | Jeff Lamberti |
| Before Party: | Republican |
| After Election: | Jack Kibbie & Jeff Lamberti[1] |
| After Party: | Democratic & Republican, respectively |
The 2004 Iowa State Senate elections took place as part of the biennial 2004 United States elections. Iowa voters elected state senators in half of the state senate's districts—the 25 even-numbered state senate districts. State senators serve four-year terms in the Iowa State Senate, with half of the seats up for election each cycle.
The primary election on June 8, 2004, determined which candidates appeared on the November 2, 2004 general election ballot. Primary election results can be obtained here.[2] General election results can be obtained here.[3]
On election day in November 2004, Republicans had control of the Iowa state Senate with 29 seats.
To take control of the chamber from Republicans, the Democrats needed to net 5 Senate seats.
The result of the 2004 election was an evenly-divided Iowa state Senate with Democrats netting 4 flips and the resulting balance being 25 seats held both by Democrats and Republicans. As a result, Jeff Lamberti and Jack Kibbie were deemed co-Senate Presidents for the Republican & Democratic halves, respectively.
| align=center | District 2 • District 4 • District 6 • District 8 • District 10 • District 12 • District 14 • District 16 • District 18 • District 20 • District 22 • District 24 • District 26 • District 28 • District 30 • District 32 • District 34 • District 36 • District 38 • District 40 • District 42 • District 44 • District 46 • District 48 • District 50 |