|Iowa House of Representatives District 8|
| Term in office began|
| Term in office ended|
Mertz is a farmer. She has served as a Democratic Precinct Leader, on the Kossuth County Central Committee, and as Vice-Chair of the Kossuth County Supervisors.
Mertz is a member of Algona Soroptimist International, American Legislative Exchange Council, Catholic Daughters of America, Department of Natural Resources Advisory Council, Future Farmers of America Educational Advisory Council, and the West Bend Drama Club.
- Agriculture (Chair)
- Legislative Council
- Natural Resources
- Subcommittee on Agriculture and Natural Resources Appropriations
Mertz did not run for re-election in 2010.
On November 4, 2008, Mertz was re-elected to the 8th District Seat in the Iowa House of Representatives, defeating Stephen Richards (R).  Mertz raised $101,596 for her campaign, while Richards raised $139,031. 
|Iowa House of Representatives, District 8|
|Dolores Mertz (D)||7,245|
|Stephen Richards (R)||7,202|
In 2008 Mertz collected $101,596 in donations.
Her four largest contributors were:
|Iowa Farm Bureau||$6,211|
|Master Builders of Iowa||$5,500|
|Iowa Bankers Association||$5,250|
|Iowa Democratic Party||$5,052|
- Dolores Mertz on the Iowa Legislature Website
- Project Vote Smart Bio
- Project Vote Smart Legislative Profile
- Campaign Contributions: 2008, 2006, 2004, 2002, 1998
|Iowa House of Representatives District 8
| Succeeded by|
Tom W. Shaw
State of Iowa
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