Collin County, Texas: Location, Cities, Administration, Judiciary

Collin County is a rapidly expanding administrative, residential and economic centre in North Texas. It forms an important part of the Dallas–Fort Worth metropolitan area and includes major employment centres, established suburbs, fast-growing cities, rural communities and large infrastructure projects.

McKinney is the county seat, while Plano is the county’s largest city. Frisco, Allen, Celina, Prosper, Princeton, Melissa, Wylie and several smaller municipalities have also experienced considerable development. The county government plays an important role in courts, elections, public safety, roads, health services, property records and services for residents of unincorporated areas.

Quick Overview of Collin County

Collin County’s population increased by about 21.7% between the 2020 population base and the July 2025 estimate. It had approximately 488,800 housing units in 2025 and more than 416,000 households during the 2020–2024 reporting period.

Location and Geographic Structure

Collin County is located north and northeast of Dallas. It borders Denton County to the west, Grayson County to the north, Fannin and Hunt counties to the east, and Dallas and Rockwall counties to the south.

The county includes:

• Densely developed suburban areas
• Corporate and technology corridors
• Historic downtown districts
• New master-planned communities
• Agricultural land
• Small towns
• Unincorporated settlements
• Lakes, creeks and Blackland Prairie landscapes

Major road connections include:

• S. Highway 75
• Dallas North Tollway
• Sam Rayburn Tollway
• President George Bush Turnpike
• S. Highway 380
• State Highway 121
• State Highway 5
• State Highway 78

Rapid residential and commercial development has increased demand for roads, public safety, courts, water systems and other government services.

Cities and Communities

Collin County contains all or part of numerous cities and towns. Municipal boundaries sometimes cross county lines, particularly around Frisco, Dallas, Richardson, Wylie, Royse City and Sachse.

Major cities

• Plano: The county’s largest city and a major corporate, technology and financial centre
• McKinney: County seat and location of the main county administration and court facilities
• Frisco: Fast-growing business, sports, entertainment and residential centre
• Allen: Established residential and commercial city along U.S. Highway 75
• Wylie: Growing city in southeastern Collin County
• Celina: Rapidly developing northern community
• Prosper: Growing town along the Dallas North Tollway corridor
• Princeton: Expanding residential city east of McKinney

Other communities include:

• Anna
• Blue Ridge
• Fairview
• Farmersville
• Josephine
• Lavon
• Lowry Crossing
• Lucas
• Melissa
• Murphy
• Nevada
• New Hope
• Parker
• Paul
• Weston

Residents inside incorporated cities generally receive police, fire, zoning and local public-works services from their municipal government. Collin County directly handles more local responsibilities in unincorporated areas.

Population and Housing

Collin County is one of the fastest-growing large counties in Texas. Its population rose from 782,341 in 2010 to more than 1.06 million in 2020 before reaching an estimated 1.29 million in 2025.

Important population and housing figures include:

• Residents under 18: 24%
• Residents aged 65 or older: 12.4%
• Foreign-born population: 23.3%
• Residents speaking another language at home: 31.2%
• Owner-occupied housing rate: 64.5%
• Median owner-occupied home value: $475,600
• Median gross monthly rent: $1,859
• Average household size: 2.77 people

The county authorised more than 19,000 residential building permits in 2025. Continued construction is especially visible in northern and eastern communities such as Celina, Anna, Melissa and Princeton.

Education and Workforce

Collin County has a highly educated workforce. Around 94.6% of residents aged 25 and older have completed high school, while approximately 56.2% hold a bachelor’s degree or higher.

The median household income during the 2020–2024 period was approximately $121,600. The county also has high levels of computer ownership and broadband access, supporting professional, technical and remote-working households.

Major educational institutions and systems include:

• Collin College
• University of Texas at Dallas, partly within Collin County
• University of North Texas at Frisco
• Independent school districts serving individual communities
• Technical and professional training centres

School districts are separate governmental bodies. They have their own elected boards, budgets and taxing authority and are not departments of Collin County government.

Economy and Employment

Collin County has developed from an agricultural region into a major corporate and professional-services centre. Plano, Frisco, McKinney and Allen contain office campuses, medical facilities, financial companies, technology firms and extensive retail development.

Important economic sectors include:

• Information technology
• Telecommunications
• Banking and financial services
• Insurance
• Healthcare
• Professional and technical services
• Construction
• Education
• Retail
• Hospitality
• Logistics and distribution

The county recorded more than 31,000 employer establishments in 2023. Healthcare and social assistance, accommodation and food services, retail, construction and professional services all contribute substantially to the local economy.

County Administration and Government

Collin County is governed by a five-member Commissioners Court. Despite its name, the Commissioners Court is primarily the county’s executive, financial and policy-making body. It is not a conventional courtroom.

The current members are:

• County Judge: Chris Hill
• Precinct 1 Commissioner: Susan Fletcher
• Precinct 2 Commissioner: Cheryl Williams
• Precinct 3 Commissioner: Darrell Hale
• Precinct 4 Commissioner: Duncan Webb

The Commissioners Court is responsible for:

• Adopting the county budget
• Setting the county property-tax rate
• Approving contracts
• Managing county property
• Funding court operations
• Planning roads and infrastructure
• Appointing certain department heads
• Approving interlocal agreements
• Managing county personnel policies
• Supporting public safety and emergency services

Each commissioner represents a geographic precinct. The County Judge presides over Commissioners Court meetings and performs administrative, budgetary and emergency-management duties.

County Administrator

Yoon Kim serves as the Collin County Administrator. The County Administrator is appointed rather than elected and manages the county’s day-to-day administrative operations.

The office works with the Commissioners Court, elected officials and department directors to ensure that county policies are implemented properly.

Major responsibilities include:

• Coordinating county departments
• Supporting budget preparation
• Implementing Commissioners Court decisions
• Monitoring administrative projects
• Managing organisational priorities
• Reviewing contracts and agreements
• Coordinating interdepartmental work
• Supporting long-term service planning

The County Administrator does not supervise independently elected officials in the same way as regular department heads. Offices such as the Sheriff, District Attorney, County Clerk and District Clerk receive their authority directly from Texas law and the voters.

Other Important County Officials

Several countywide positions are filled through elections. These officials have their own legal powers and responsibilities.

Important officeholders include:

• District Attorney: Greg Willis
• Sheriff: Jim Skinner
• County Clerk: Stacey Kemp
• District Clerk: Michael Gould
• Tax Assessor-Collector: Scott Grigg
• Elections Administrator: Kaleb Breaux
• County Auditor: Robert D. Cone

Their duties include:

• Prosecuting criminal cases
• Operating the county jail
• Providing law-enforcement services
• Maintaining court records
• Recording property documents
• Issuing marriage licences
• Collecting vehicle and property-related taxes
• Conducting elections
• Reviewing county finances

Residents should contact the office responsible for the particular record or service they need. County records are distributed across several elected offices and administrative departments.

Judiciary and Court System

Collin County has a multi-level court system handling criminal, civil, family, probate, juvenile and lower-level local matters.

The main system includes:

• District courts
• County courts at law
• Probate Court
• Justice of the Peace courts
• Magistrate Court
• Juvenile Court
• Specialty courts

The main Collin County Courthouse is located on Bloomdale Road in McKinney. However, some court offices and services operate from other county buildings.

District Courts

Collin County has 15 district courts. Their jurisdiction generally includes:

• Felony criminal cases
• Family-law cases
• Divorce and child-custody matters
• Major civil disputes
• Property cases
• Juvenile proceedings
• Other cases assigned under Texas law

Judge Christine Nowak of the 493rd District Court serves as the Local Administrative District Judge. The local administrative judge helps coordinate court administration, case assignments and other operational matters involving the district courts.

County Courts at Law

Collin County has seven statutory county courts at law. Their jurisdiction generally includes:

• Misdemeanour criminal cases
• Appeals from Justice of the Peace courts
• Selected civil disputes
• Mental-health proceedings
• Occupational driver’s licence cases
• Other matters authorised by state law

Judge David Rippel of County Court at Law No. 4 serves as the Local Administrative County Judge.

Probate Court

Probate Court No. 1 handles matters involving:

• Wills
• Estates
• Guardianships
• Heirship proceedings
• Administration of property after death
• Related probate disputes

Judge Sarah Duff presides over Probate Court No. 1.

Justice of the Peace Courts

Collin County has four Justice of the Peace precincts. These courts generally handle:

• Small claims
• Evictions
• Certain debt claims
• Class C misdemeanours
• Traffic cases
• Civil matters within statutory limits
• Preliminary criminal proceedings
• Search and arrest warrants

Residents must use the correct precinct and court location for their case.

Public Safety and Emergency Services

Law-enforcement responsibilities depend on the location.

Municipal police departments serve incorporated cities such as Plano, McKinney, Frisco and Allen. The Collin County Sheriff’s Office has countywide jurisdiction but is particularly important in unincorporated areas.

County public-safety responsibilities include:

• Sheriff’s patrol operations
• County jail management
• Courthouse security
• Criminal investigations
• Emergency management
• Fire Marshal services
• Medical Examiner services
• Constable services
• Juvenile services
• Community supervision and corrections

Constables serve legal documents, assist courts and perform law-enforcement functions within their precincts.

Roads, Mobility and Infrastructure

Collin County’s population growth has placed considerable pressure on roads and transport systems. County government works with cities, the Texas Department of Transportation, the North Texas Tollway Authority and regional planning organisations.

County responsibilities include:

• Maintaining eligible county roads
• Repairing bridges
• Planning future road corridors
• Acquiring rights of way
• Administering voter-approved road bonds
• Coordinating projects with municipalities
• Supporting long-term mobility planning

Public transportation varies by city. Dallas Area Rapid Transit serves Plano, Richardson and parts of Dallas, while other communities use city-operated, regional or demand-response services.

Health, Records and Community Services

Collin County operates or supports services involving:

• Disease surveillance
• Vaccination and public health
• Emergency health preparedness
• Indigent healthcare
• Animal services
• Veterans services
• Elections
• Property and court records
• Parks and open spaces
• Juvenile programmes
• Mental-health and specialty courts

County parks and preserved spaces include Myers Park and Event Center, Parkhill Prairie, Sister Grove Park and sections of regional trail projects. Public Works also maintains eligible county roads and bridges.

Frequently Asked Questions

Q1. Is Collin County the same government as McKinney or Plano?

A: No. McKinney, Plano and other incorporated cities have their own councils, police departments and municipal services. Collin County is a separate government responsible for countywide courts, elections, records, public safety and services in unincorporated areas.

Q2. What is the difference between the County Judge and a district judge?

A: The County Judge leads the Commissioners Court and mainly performs executive, budgetary and emergency-management duties. District judges preside over legal cases such as felonies, family disputes and major civil matters.

Q3. Where are the main Collin County offices located?

A: Many administrative offices are located at the Jack Hatchell Collin County Administration Building on Bloomdale Road in McKinney. The main courthouse is also on Bloomdale Road. Some departments maintain additional offices in Plano, Frisco and other locations.

Q4. Which clerk keeps court records?

A: The District Clerk maintains records for district courts, including felony, family and major civil cases. The County Clerk supports county courts at law and also maintains property, marriage and other county records.

Q5. Does Collin County provide police services inside cities?

A: Cities generally provide their own police services. The Sheriff’s Office has countywide authority but focuses heavily on unincorporated areas, jail operations, court security and responsibilities assigned under state law.