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Run for OfficeJune 15, 2026 · 9 min read

How to run for Collin County Commissioner

County commissioner is a partisan office decided in a March primary — not the nonpartisan May municipal cycle. Here's how the race works and how to win your precinct.

Running for Collin County Commissioner is different from almost every other local race in North Texas — and the difference catches first-timers off guard. Most local seats here (city council, mayor, school board) are officially nonpartisan and decided on the May ballot. County commissioner is partisan: you run with a party label, and the race is usually decided in the March primary, not in May. In a county that's the #2 fastest-growing in the United States — roughly 1.3 million people now, on track for about 1.4 million by 2030 — a commissioner's decisions on roads, budgets, and county services touch every one of those new arrivals. This guide explains how the office works and how to actually win your precinct.

Key takeaways

  • County commissioner is a partisan office — you run with a party label and usually win or lose in the March primary, not the nonpartisan May cycle.
  • Commissioners serve on the Collin County Commissioners Court alongside the County Judge — four commissioners, each elected from a single precinct (not countywide).
  • Filing runs through the county party for the primary, with its own December deadline — a different calendar than May municipal races.
  • You still must appoint a campaign treasurer before you raise or spend a dollar, and file campaign-finance reports.
  • Because you run in one of four precincts, your voter universe is a slice of the county — but a large and fast-changing one.

What does a Collin County Commissioner actually do?

The Commissioners Court is the governing body of the county. In Collin County it's made up of the County Judge (elected countywide) and four county commissioners, each elected from one of four geographic precincts. Despite the name, it isn't a courtroom — it's the county's legislative and budget body. Commissioners:

  • Set the county budget and the county property-tax rate;
  • Oversee roads, bridges, and infrastructure in their precinct;
  • Manage county facilities, the sheriff's funding, the courts' funding, and county services;
  • Approve contracts, appointments, and major county purchases.

County precinct ≠ voting precinct

A commissioner's 'precinct' is one of four large geographic divisions of the county — each home to hundreds of thousands of residents — not the small neighborhood voting precinct on your registration card. Confirm exactly which county precinct you live in (and which seat is up) with the Collin County Elections Administration.

How is this different from a nonpartisan May race?

This is the single most important thing to understand before you file. The nonpartisan May races most North Texans know — city council and school board — have no party labels and run on the May Uniform Election Date. County commissioner runs on the partisan track instead:

County Commissioner (partisan)City / School Board (nonpartisan)
Party on ballotYes — you run as a party's nomineeNo party labels
Decisive electionMarch primary (then November general)May Uniform Election Date
Who you file withThe county party for the primaryCity secretary or school district
Run-offPrimary run-off in May if no majorityCity: June run-off; ISD: none (plurality)
GeographyOne of four county precinctsCitywide / at-large or single-member district

In a county where one party dominates a given precinct, the primary is effectively the election — whoever wins the contested primary is heavily favored in November. That flips your strategy: you're persuading and turning out primary voters in March, a smaller and more ideological universe than the May municipal electorate.

How do you file to run for county commissioner?

The partisan path has its own paperwork and a much earlier deadline than May races. In order:

  1. 1.Appoint a campaign treasurer. File a *Campaign Treasurer Appointment* (form CTA) before you accept any contribution or make any expenditure. See our treasurer appointment guide.
  2. 2.Decide your party and get the candidate packet from that county party (the party administers the primary). Confirm your county precinct and that the seat is up this cycle.
  3. 3.File your Application for a Place on the Ballot with the county party by the primary filing deadline — typically in December for a March primary, far earlier than the mid-February deadline for May races. Confirm the exact date and filing fee or petition signatures with the party and county.
  4. 4.Calendar your campaign-finance deadlines. As a county candidate you'll file Form C/OH reports; watch the 30-day and 8-day pre-primary reports, and remember a May primary run-off has its own deadlines.

The December deadline sneaks up on people

Because the primary calendar starts months before the May municipal calendar, candidates who 'plan to file in February' miss the window entirely. If you're aiming at the March primary, treat the prior December as your hard deadline — and confirm the exact date with the county party and the Collin County Elections Administration.

Mandate maps your precinct and your primary universe.

Tell Mandate you're running for county commissioner and it builds the voter universe for your precinct, models who actually votes in a March primary, and gives you walk lists, texting, mail, and Texas-ready compliance — all in one login. Nonpartisan tooling, whichever primary you run in.

How do you win a county commissioner precinct?

A commissioner precinct is geographically smaller than the whole county but still huge — hundreds of thousands of residents and a voter base that churns constantly, since about 83% of Collin County's growth is in-migration. Winning campaigns:

  • Target primary voters, not all voters. Build your universe from people who actually vote in your party's primary — a fraction of registered voters. Don't waste contacts on November-only or municipal-only voters.
  • Know your number. Estimate primary turnout in your precinct and the votes needed to win (or to force a run-off). Our votes-to-win guide shows how.
  • Combine field and mail at precinct scale. Pair targeted block-walking with direct mail and phone banking to cover a precinct too large to knock alone.
  • Bank the early vote. Texas primaries have a long early-vote period — identify supporters, get them to vote early, then chase the rest on primary day.

The bottom line

Collin County Commissioner is a partisan, precinct-level race won in the March primary — a different calendar, a different filing path, and a different voter universe than the nonpartisan May races. Appoint your treasurer first, file with the county party by the December deadline, and build a primary-voter plan for your precinct. For the broader local landscape, see our pillar guide to running for office in Collin County and why Texas local races are nonpartisan, or explore Mandate's platform and the North Dallas overview.

Frequently asked questions

Is county commissioner a partisan or nonpartisan office in Texas?

It's partisan. Unlike Texas city council and school board races — which are officially nonpartisan and run in May — county commissioner candidates run with a party label and are usually decided in the March primary.

When do you file to run for Collin County Commissioner?

Because the race runs through the March primary, the filing deadline typically falls the prior December — months earlier than the mid-February deadline for May municipal races. Confirm the exact date with your county party and the Collin County Elections Administration.

How many commissioners are on the Collin County Commissioners Court?

Four county commissioners, each elected from one of four geographic precincts, plus the County Judge who is elected countywide and presides over the court.

Do I run countywide for commissioner?

No. Each commissioner is elected from a single county precinct — one of four large geographic divisions — so your voter universe is that precinct, not the whole county. Only the County Judge is elected countywide.

Do I still need a campaign treasurer for a county race?

Yes. Every Texas candidate must appoint a campaign treasurer and file the appointment before accepting any contribution or making any expenditure, including partisan county candidates.

Run your whole campaign on one platform.

Mandate builds your voter universe, walk lists, GOTV, and Texas-ready compliance — start to finish, in one login. Tell us your race and we'll map it.

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