Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Population over time
Petrolia had 514 residents in the 2020 census, down 34% since 2000.
It’s the 1327th largest of 1,778 towns in Texas by population.
Clay County grew from 9,231 residents in 1900 to 10,218 in 2020.
Clay County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Weather by month
Average highs peak around 97°F in summer, and winter lows average 29°F. About 32.1 inches of rain and melted snow fall in a typical year, with about 1 inches of snow.
Source: NOAA 1991–2020 climate normals, Henrietta, TX weather station (14 miles away).
Jobs in Clay County
1,108 jobs at 162 businesses in Clay County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Health care
Nearest hospitals
Clay County Memorial HospitalCritical access hospital · emergency room · Henrietta13.9 miles
United Regional Health Care SystemGeneral hospital · emergency room · CMS rating 3 of 5 · Wichita Falls17.1 miles
Jefferson County HospitalCritical access hospital · emergency room · Waurika17.5 miles
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Schools in Petrolia
Public schools here are run by Petrolia CISD. Check each district’s attendance zones for a specific address.
Public schools(2)
School
Grades
Students
Type
Distance
Petrolia ElPetrolia
Pre-K–6
277
Public
0.3 mi
Petrolia Junior High/High SchoolPetrolia
7–12
233
Public
0.8 mi
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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