1,296,888 people (2024 Census estimate, +1.9% since 2020)
867 square miles of land · 1,495 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.
108 active community water systems list Oakland County in the area they serve, reporting 1,042,954 people served in all (a system that crosses county lines counts its whole population).
| TROY buys surface water · local government · MI0006690 | 85,854 served |
| ROCHESTER HILLS buys surface water · local government · MI0000325 | 74,000 served |
| WATERFORD TOWNSHIP groundwater · local government · MI0006910 | 73,441 served |
| SOUTHFIELD buys surface water · local government · MI0006160 | 71,739 served |
| PONTIAC buys surface water · local government · MI0005440 | 63,776 served |
| ROYAL OAK, CITY OF buys surface water · local government · MI0005830 | 57,236 served |
| FARMINGTON HILLS, CITY OF buys surface water · local government · MI0002240 | 56,984 served |
| NOVI, CITY OF buys surface water · local government · MI0004870 | 56,780 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 1,047 people were held in Oakland County's jail, in Vera's latest figure (2024), or 128 per 100,000 residents ages 15–64. In 2019 it was about 1,305.
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.
27 school districts have their office in Oakland County. School taxes are usually the largest part of a property tax bill.
Spent $250.8 million — $219.8 million to run schools, about $14,637 per student, plus $17.6 million on buildings and equipment. Money in: $74.4 million local (mostly property tax), $165.3 million state, $18.4 million federal. Long-term debt: $140.5 million.
Spent $222.1 million — $196.4 million to run schools, about $15,761 per student, plus $15.6 million on buildings and equipment. Money in: $93.1 million local (mostly property tax), $128.2 million state, $13.8 million federal. Long-term debt: $101.6 million.
Spent $269.5 million — $185.9 million to run schools, about $15,362 per student, plus $65.4 million on buildings and equipment. Money in: $90.8 million local (mostly property tax), $121.9 million state, $14.7 million federal. Long-term debt: $370.5 million.
Spent $202.1 million — $159.2 million to run schools, about $17,604 per student, plus $33.7 million on buildings and equipment. Money in: $81.4 million local (mostly property tax), $96 million state, $9.5 million federal. Long-term debt: $153.7 million.
Spent $148.4 million — $114.3 million to run schools, about $13,496 per student, plus $24.3 million on buildings and equipment. Money in: $45.1 million local (mostly property tax), $89.3 million state, $9.7 million federal. Long-term debt: $161.1 million.
Spent $167.8 million — $118.4 million to run schools, about $14,850 per student, plus $40.4 million on buildings and equipment. Money in: $60.1 million local (mostly property tax), $88.9 million state, $5.7 million federal. Long-term debt: $116.8 million.
Spent $135.4 million — $123.8 million to run schools, about $16,234 per student, plus $3.4 million on buildings and equipment. Money in: $45.1 million local (mostly property tax), $102.6 million state, $10.3 million federal. Long-term debt: $240.3 million.
Spent $211.5 million — $149.8 million to run schools, about $20,475 per student, plus $46.6 million on buildings and equipment. Money in: $103.8 million local (mostly property tax), $75.7 million state, $4.3 million federal. Long-term debt: $229.2 million.
And 19 more.
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 High compared with other U.S. counties. FEMA estimates natural hazards cost Oakland County about $359.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
513 bridges in Oakland County: 215 in good condition, 263 fair, and 35 poor (6.8%). “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.
| I-696 over I-75 & 4 RAMPS · built 1971 | 209,200 vehicles a day |
| I-75 BR over CLINTON RIVER · built 1964 | 40,292 vehicles a day |
| I-75 NB over CLARKSTON RD · built 1962 | 35,763 vehicles a day |
| SASHABAW RD over CLINTON RIVER · built 1928 | 15,800 vehicles a day |
| 9 MILE RD over CADDELL DRAIN · built 1973 | 10,800 vehicles a day |
| MARTIN LUTHER KING over GRAND TRUNK WESTERN RR · built 1976 | 8,700 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $285.8 million of work in Oakland County in fiscal 2025, about $224 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 Michigan 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 Oakland 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 Oakland County built: brayden.ozark@gmail.com.
More of Michigan: the state government and every county in Michigan.
Nearby counties: Macomb County (24 mi) · Wayne County (27 mi) · Livingston County (27 mi) · Genesee County (30 mi) · Lapeer County (31 mi) · Washtenaw County (37 mi).