RepublicanIn office since Nov 2016

David A. Sieck

Iowa State Representative, District 16 since 2016. Re-elected in 2026. Next on the ballot in 2028.

Iowa State Representative, District 16Born 1957

Official website Wikipedia

In office: 9 yrs; Since 2016
Bills became law: 0; 24 sponsored, 2025–2026 session
Votes missed: 20.7%; Chamber median 3.8%
With party: 97%; On votes splitting the parties
Last margin: +34.7; Won 2026
Next election: 2028; Nov 7, 2028

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:52 PM ET

Committees

As of 2026-10.

Agriculture
Economic Growth and Technology
Transportation

Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET

Legislation

2025–2026 session · 24 sponsored · 0 became law

BillIntroCmteHouseSenateLaw

HF 2209 A bill for an act providing for the admission of students to the Iowa state university of science and…
college of veterinary medicine · Failed in the House Apr 2026

HF 981 A bill for an act relating to real property, including the removal of unauthorized persons and trespass, and…
adverse possession · Failed in the House Mar 2026

HF 494 A bill for an act relating to the operation of railroad trains by a crew of two or more persons, and…
railroads · Failed in the House Jan 2026

HF 617 A bill for an act modifying public improvements relating to housing and residential development in urban…
city government · Failed in the House May 2025

HF 565 A bill for an act establishing a partial exemption on property taxes for certain residential properties sold…
disasters · Failed in the House May 2025

Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET

Voting record

2025–2026 session · placement by roll-call votes

Where Sieck sits in the Iowa House of Representatives

Sieck is closer to the center than 63% of the chamber's Republicans.

Closest: Judd Lawler, Jennifer Smith, Bill Gustoff

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:49 PM ET

With Sieck’s party

Votes with the chamber's Republicans97%

Black tick: the average of Republicans in the Iowa House of Representatives.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

Votes chosen for their effect, not their side: Sieck’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.

Date	Bill	Sieck	Rep. majority	Dem. majority	Result
May 2, 2026	HF 2542: A bill for an act relating to habitual offenders, and providing penalties.	Yes	Yes	No	Passed 66–20
May 2, 2026	SF 2490: A bill for an act relating to oil and gas production, including filing requirements, the…	Yes	Yes	No	Passed 65–21
May 2, 2026	HF 2771: A bill for an act relating to and making appropriations involving state government…	Yes	Yes	No	Passed 66–18
May 2, 2026	SF 2472: A bill for an act relating to state and local government taxes, fees, financial…	Yes	Yes	No	Passed 62–22
Apr 29, 2026	SF 2218: A bill for an act relating to state regulatory compliance and eligibility requirements,…	Yes	Yes	No	Passed 71–20

Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls

Career

Offices held, and every time Sieck was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.

2016201720182019202020212022202320242025202620272028Iowa House of Representatives, District 23 Iowa House of Representatives, District 16

Source: 99chambers results archive (MEDSL, Klarner, state election offices)

Elections

Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.

Year	Race	Result	Margin	Seat	+/−
2026	Iowa House District 16	Won	R+34.7	R+43.0	−8.3
2024	Iowa House of Representatives, District 16	Won	R+50.1	—	—
2022	Iowa House of Representatives, District 16	Won	—	—	—
2020	Iowa House of Representatives, District 23	Won	—	—	—
2018	Iowa House of Representatives, District 23	Won	R+32.3	—	—
2016	Iowa House of Representatives, District 23	Won	R+42.5	—	—