7,380 people (2024 Census estimate, +0.6% since 2020)
894 square miles of land · 8 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
4 active community water systems list Castro County in the area they serve, reporting 5,844 people served in all (a system that crosses county lines counts its whole population).
| DIMMITT MUNICIPAL WATER SYSTEM groundwater · local government · TX0350001 | 4,393 served |
| HART MUNICIPAL WATER SYSTEM groundwater · local government · TX0350002 | 1,000 served |
| NAZARETH MUNICIPAL WATER SYSTEM groundwater · local government · TX0350003 | 311 served |
| SKYWATER WSC groundwater · private · TX0350014 | 140 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 25 people were held in Castro County's jail, in Vera's latest figure (2026). In 2021 it was about 23.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
3 school districts have their office in Castro County. School taxes are usually the largest part of a property tax bill.
Spent $17 million — $14.9 million to run schools, about $13,557 per student, plus $514,000 on buildings and equipment. Money in: $6.5 million local (mostly property tax), $9.3 million state, $3.7 million federal. Long-term debt: $29.3 million.
Spent $3.9 million — $3.5 million to run schools, about $13,960 per student, plus $355,000 on buildings and equipment. Money in: $1.3 million local (mostly property tax), $2.4 million state, $368,000 federal. Long-term debt: $220,000.
Spent $4.2 million — $3.3 million to run schools, about $15,763 per student, plus $818,000 on buildings and equipment. Money in: $1.5 million local (mostly property tax), $2 million state, $1.2 million federal. Long-term debt: $1.6 million.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Castro County about $7.7 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
10 bridges in Castro County: 9 in good condition, 1 fair, and 0 poor (0.0%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $451,935 of work in Castro County in fiscal 2025, about $61 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
General election: Tuesday, November 3, 2026. Last day to register to vote: 2026-10-05. Early voting: 2026-10-19 to 2026-10-30. Mail ballot application must be received: 2026-10-23. Election Day: 2026-11-03.
Source: Texas Secretary of State, Sept. 28, 2026 · VoteTexas.gov — early voting · VoteTexas.gov
The budget, property tax rates, audits, local officials and offices for Castro County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Castro County built: brayden.ozark@gmail.com.
More of Texas: the state government and every county in Texas.
Nearby counties: Swisher County (29 mi) · Parmer County (30 mi) · Lamb County (32 mi) · Deaf Smith County (34 mi) · Randall County (36 mi) · Hale County (41 mi).