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State Sen. Mark Costello

State Senator · Iowa State Senate · Republican

State Senator for Iowa, District 8.

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Phone

Capitol515-281-3371📞 Call

Capitol office

Iowa State Senate
1007 E. Grand Ave.
Des Moines, IA 50319

mark.costello@legis.iowa.gov

Online

homepageiowasenaterepublicans.com/senators/mark-costello

websitelegis.iowa.gov/legislators/legislator?ga=88&personID=10749

websitelegis.iowa.gov/legislators/legislator?ga=89&personID=10749

websitelegis.iowa.gov/legislators/legislator?personID=10749

The official office email, as the state publishes it.

Committees

SenateAgriculture

SenateAppropriations

SenateHealth and Human ServicesVice Chair

JointHealth Policy Oversight

SenateNatural Resources and Environment

JointSubacute Mental Health Care Services Interim Study

SenateTransportation

SenateVeterans Affairs

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Source: Open States (public domain), from the official state websites. Last checked October 29, 2026. Official website ↗