---
type: Person
title: "Mark Baisley"
description: "CO Senate District 4 — CO State Senate District 4"
role: "CO Senate District 4"
party: "R"
level: "state"
branch: "legislative"
state: "CO"
district: "CO State Senate District 4"
represents: "us/states/co/districts/senate/4"
tenure:
  start: "2023-01-09"
  current: true
election:
  term_length: 2
  term_limit: "varies"
ids:
  person: "7ceb38c5-8482-4d83-b564-ad0105ba12c6"
  office: "068762c7-cddd-4e04-92bb-75efa38f95a0"
  tenure: "b9dac7b6-968e-4ad2-bca8-1501251bea06"
  jurisdiction: "4e2948c7-d92e-45bd-9a5b-447924c1a7ee"
sources:
  - field: tenure
    source: "OpenStates YAML via GitHub 2026-06-20"
  - field: jurisdiction
    source: "SLDU (Census 2025)"
confidence: official
tags: [officeholder, state, legislative, co]
timestamp: "2026-07-04"
---

# Mark Baisley

Current CO Senate District 4 (CO State Senate District 4).

Represents [CO State Senate District 4](/us/states/co/districts/senate/4.md).

## Sources

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

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