County Executive
August 4, 2026 · St. Louis County, Missouri · County · primary
How do we calculate vote impact?
Vote impact = representation (how much weight one vote carries here, the smaller the district's population, the higher the representation) + decisiveness (how likely this race is to be close, based on past results and number of candidates).
Representation: Low · 0 out of 100
This district is large for its type, so each vote is a smaller slice of the outcome. About 995,569 people live here.
score = 100 × ln(largest population ÷ this district's) ÷ ln(largest ÷ smallest), rounded to 2 decimals = 100 × ln(995,569 ÷ 995,569) ÷ ln(995,569 ÷ 1,934) = 0, comparing counties in MO (grades: 66+ high, 33+ average, otherwise low)
Decisiveness: Unknown
No past results for this contest yet.
Low representation + unknown decisiveness → Below average vote impact.
Some data is missing, so this rating is based on partial information and capped at "High".
County Executive is responsible for:
- Running county government day to day, like a mayor for the county
- Proposing the county budget
- Overseeing county departments and hiring their leaders
- Hearing certain court cases in some Texas counties, where this office is called County Judge or County Judge/Executive
Affected Areas: Environment and Public Health, Government Efficiency, Healthcare Affordability, Government Spending Reduction, Public Safety and Crime Control, Housing Affordability, Social Programs and Welfare, Public Infrastructure
Candidates
Angela Walton Mosley
Democratic · declared
Angela Walton Mosley is a Missouri state senator representing District 13 and serves as the Senate Minority Caucus Chair. She was first elected to the Senate in 2020 and took office in January 2021. She is a graduate of Central Visual and Performing Arts High School and Grambling State University.
Records: Environment and Public Health 1 for, 1 against, Government Efficiency 1 for, Public Infrastructure 2 for, Public Safety and Crime Control 4 for, Social Programs and Welfare 4 for
Brian Williams
Democratic · declared
Brian Williams has represented Missouri Senate District 14 in St. Louis County since 2018. Before entering the Senate, he worked as a congressional staffer and on public-health policy, including Missouri's rollout of the Affordable Care Act Marketplace.
Records: Environment and Public Health 1 for, Government Efficiency 1 for, Healthcare Affordability 1 for, Public Infrastructure 1 for, Public Safety and Crime Control 4 for, Social Programs and Welfare 1 for
Dennis Hancock
Republican · declared
Dennis Hancock represents District 3 on the St. Louis County Council and previously served 12 years as mayor of Fenton. His private-sector career included 27 years at Verizon, facilities management, and small-business ownership.
Records: Government Efficiency 3 for, Government Spending Reduction 1 for, Housing Affordability 1 for
Jake Zimmerman
Democratic · declared
Jake Zimmerman is the elected St. Louis County Assessor. He previously served in the Missouri House of Representatives and worked as a Missouri assistant attorney general, an attorney in private practice, and deputy chief legal counsel to Governor Bob Holden.
Records: Government Efficiency 3 for
J D McFarland
Green · declared
J D McFarland is the Green Party candidate for St. Louis County Executive in the August 4, 2026 primary election.
Election sources
Source: extcontent.stlouisco.com
Source: sos.mo.gov