38,107 people (2024 Census estimate, +0.8% since 2020)
730 square miles of land · 52 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.
11 active community water systems list Jasper County in the area they serve, reporting 63,898 people served in all (a system that crosses county lines counts its whole population).
| IA REGIONAL UTILITIES ASSOC (WAVERLY) groundwater · private · IA0990701 | 37,820 served |
| NEWTON WATER SUPPLY groundwater · local government · IA5059064 | 16,518 served |
| COLFAX WATER SUPPLY groundwater · local government · IA5009056 | 2,305 served |
| MONROE WATER SUPPLY buys groundwater · local government · IA5054096 | 2,007 served |
| PRAIRIE CITY WATER WORKS groundwater · local government · IA5064055 | 1,703 served |
| BAXTER WATER SUPPLY buys groundwater · local government · IA5003091 | 1,002 served |
| SULLY MUNI WATER WORKS buys groundwater · local government · IA5076005 | 900 served |
| KELLOGG WATER SUPPLY groundwater · local government · IA5038017 | 617 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 67 people were held in Jasper County's jail, in Vera's latest figure (2019), or 282 per 100,000 residents ages 15–64. In 2014 it was about 30.
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.
5 school districts have their office in Jasper County. School taxes are usually the largest part of a property tax bill.
Spent $49.3 million — $40.4 million to run schools, about $14,130 per student, plus $5.7 million on buildings and equipment. Money in: $17.9 million local (mostly property tax), $27.7 million state, $4.9 million federal. Long-term debt: $24.4 million.
Spent $15 million — $13.4 million to run schools, about $11,871 per student, plus $804,000 on buildings and equipment. Money in: $7.2 million local (mostly property tax), $8.9 million state, $1.1 million federal. Long-term debt: $14.4 million.
Spent $18.6 million — $9.9 million to run schools, about $13,637 per student, plus $7.3 million on buildings and equipment. Money in: $5.8 million local (mostly property tax), $6.5 million state, $1 million federal. Long-term debt: $17.1 million.
Spent $8.1 million — $6.4 million to run schools, about $11,749 per student, plus $1.1 million on buildings and equipment. Money in: $4.6 million local (mostly property tax), $3.8 million state, $422,000 federal. Long-term debt: $5.2 million.
Spent $6.8 million — $6 million to run schools, about $12,296 per student, plus $145,000 on buildings and equipment. Money in: $3.7 million local (mostly property tax), $3.3 million state, $517,000 federal. Long-term debt: $7.2 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: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Jasper County about $16.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
382 bridges in Jasper County: 148 in good condition, 126 fair, and 108 poor (28.3%). “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.
| WB I-80 over SUGAR CREEK · built 1960 | 18,050 vehicles a day |
| HIGHWAY F-48 W over SMALL STREAM · built 1949 | 1,530 vehicles a day |
| HIGHWAY F-62 E over ELK CREEK · built 1962 | 1,370 vehicles a day |
| F-62 over NORTH SKUNK RIVER · built 1935 | 1,170 vehicles a day |
| FM over N. SKUNK RIVER · built 1964 | 970 vehicles a day |
| HIGHWAY S-74 S over CARSON CREEK · built 1964 | 810 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $8.3 million of work in Jasper County in fiscal 2025, about $221 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.
Registration deadlines, early voting and polling places for Iowa are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Jasper 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 Jasper County built: brayden.ozark@gmail.com.
More of Iowa: the state government and every county in Iowa.
Nearby counties: Marion County (25 mi) · Marshall County (25 mi) · Polk County (27 mi) · Poweshiek County (27 mi) · Story County (32 mi) · Mahaska County (33 mi).