Williamson County Jester Annex
Commissioner Precinct One
1801 East Old Settlers Blvd.
Suite #110
Round Rock, TX 78664
Phone: (512) 244-8610
Fax: (512) 244-8616
Driving Directions

Doris Sanchez
Communications Specialist
(512) 244-8610 Direct Line

Garry Brown
Executive Assistant
(512) 244-8615

Commissioner Precinct One, Terry Cook

Terry has completed her first year in office and is busily into her second year, tackling the issues that affect individuals and families of Precinct 1 and beyond. Although her constituency comprises Precinct 1, Terry works hard for every resident of Williamson County, ensuring that she does so in a fair and bipartisan manner.

Since becoming a county commissioner, Terry has burned the county midnight oil pouring over the budget looking to stretch every dollar to better serve every taxpayer and resident of the county. Making certain that our county funds are used responsibly, Terry maintains her pledge to make Williamson County a place where every man, woman, and child has an opportunity for quality, fulfilling lives without onerous tax and debt burdens.

One of her priorities is to focus on the underserved, like those who suffer from mental illness and/or addiction, face workforce housing shortages, and lack adequate health care. Yet, her listening ear doesn’t stop there. Terry visits with HOAs, talking to homeowners about working together to better their communities and responding to their neighborhood concerns. She continues to study and support the partnership between government and business in promoting responsible growth and economic development.

As an active and dedicated member of the Capital Area Regional Transportation Planning Organization (CARTPO), to which she was appointed last year, Terry is proactive in advocating for tomorrow’s transportation needs today. One of her highest priorities is reducing congestion through road improvement funding.

Terry also serves on the Central Texas ;Clean Air Coalition (CAC) of the Capital Area Council of Governments (CAPCOG), a voluntary association of organizations that support the regional effort of improving air quality in Bastrop, Caldwell, Hays, Travis, and Williamson counties. Her membership complements her belief that every Texan deserves to breathe clean air, which in turn attracts business and job growth.

When she lived in Colorado, Terry was a Master Gardener in a county with the most extensive public outreach program in the state. This background serves her immensely as a new member of the Williamson County AgriLife Leadership Advisory Board (LAB).

She has a master’s degree in biomedical engineering from Duke University and worked in research and high-tech industries for 20-plus years. As a former small business owner here in Williamson County, she has also developed a strong business perspective. She has extensive experience in managing people and projects, budgeting, and contract negotiation with companies, small and large alike.

Terry tirelessly urges civic engagement and strongly encourages others to do the same. She has been a volunteer deputy voter registrar for Bell, Travis, and Williamson counties, registering voters from all over the region. She also has served in Williamson County as an elections clerk, and as an alternate judge during elections. Furthermore, Terry has been involved in the planning and design of public parks and management of open space.

Terry and her husband, Wayne, have called Round Rock their home for over 12years. She enjoys interior and landscape design, unique dining experiences, traveling, Bible study, live theater, and music.


To lead pro-actively on the Williamson County Commissioners Court while advocating for the constituents of Precinct 1 and the county at-large from a foundation of collaboration and respect.


To transform Williamson County government into a more accessible, responsive, transparent, and well-managed organization for our residents, so that we become the community recognized as the best in central Texas to live and enjoy.


Accountability, commitment, integrity, and respect form the core values that guide the Williamson County Commissioner Precinct 1 office.