---
type: Person
title: "Mark Costello"
description: "IA Senate District 8 — IA State Senate District 8"
role: "IA Senate District 8"
party: "R"
level: "state"
branch: "legislative"
state: "IA"
district: "IA State Senate District 8"
represents: "us/states/ia/districts/senate/8"
tenure:
  start: "2023-01-03"
  current: true
election:
  term_length: 2
  term_limit: "varies"
ids:
  person: "7c63a226-f72a-4fc7-af32-3f3594674355"
  office: "99eb3fad-2e73-455b-9cd2-605ecfbdc631"
  tenure: "0a7e1ad1-4483-4d70-a26d-081399a4218f"
  jurisdiction: "872c73e3-7e9a-4a02-9e81-79674c8dde90"
sources:
  - field: tenure
    source: "OpenStates YAML via GitHub 2026-06-20"
  - field: jurisdiction
    source: "SLDU (Census 2025)"
confidence: official
tags: [officeholder, state, legislative, ia]
timestamp: "2026-07-04"
---

# Mark Costello

Current IA Senate District 8 (IA State Senate District 8).

Represents [IA State Senate District 8](/us/states/ia/districts/senate/8.md).

## Sources

- tenure: OpenStates YAML via GitHub 2026-06-20
- jurisdiction: SLDU (Census 2025)

Generated from the Atlas officeholders v3 export (2026-07-04).