What county age data can and cannot tell you about care

A county age count on this desk is one column in one public file, filtered to one YEAR code. For the St. Louis MO-IL region that filter, applied to the fifteen counties of the metropolitan statistical area, returns 535,836 residents aged 65 and over out of 2,811,927 residents, 19.1 percent, and 55,917 residents aged 85 and over. For Missouri it returns 1,169,583 residents aged 65 and over across 115 county equivalents, 18.7 percent of the state. Those are estimates of who lived in those counties on July 1, 2024. They are not a count of who needed help on that date, and they are not a count of who will need help next year.

The independent city of St. Louis is a county equivalent. It appears as its own row, with 46,992 residents aged 65 and over, 16.8 percent of 279,695. It is not inside the St. Louis County row of 199,345. If you add them, you have invented a geography this desk does not publish. If the house is in the city, read the city. If the house is in the county, read the county. The methodology page exists partly because that one confusion produces the largest silent error on a regional map.

The fifteen-county list is the Office of Management and Budget's St. Louis MO-IL metropolitan statistical area. No county is dropped for size. Calhoun County's 1,077 residents aged 65 and over is in the file for the same reason St. Louis County's 199,345 is in the file. The item set was fixed before any value was read.

Each county appears in the vintage file several times. In the 2020 to 2024 vintage the YEAR codes run 1 through 6. Code 1 is the April 1, 2020 census base. Codes 2 through 6 are the July 1 estimates for 2020, 2021, 2022, 2023 and 2024. This desk reads YEAR 6 and only YEAR 6. Mixing YEAR codes inside one table is, as the methodology page puts it, the most common way to produce a county comparison that looks coherent and is not.

A pull date of September 10, 2026 and a reference date of July 1, 2024 are two different facts. Both are printed on every page, including this one. The lag is the Census Bureau's publication cycle, not a stale download. When you use a number from this desk, the honest sentence is "as of July 1, 2024, according to Vintage 2024, read on September 10, 2026." Anything shorter hides the lag. Anything that says "now" is a claim the file does not support.

The estimates are modelled from the 2020 census base and updated with administrative records covering births, deaths and migration. They are not a fresh enumeration. The smallest counties carry the widest relative uncertainty. Calhoun County's 114 residents aged 85 and over is the smallest 85-and-over cell in the regional table. Treat it as an estimate with more slack than St. Louis County's 22,623, not as a headcount you could verify on a walk.

Count tells you where the older adults are. Share tells you how much of a county is older. Inside the region, county shares aged 65 and over run from 15.5 percent in Lincoln County to 25.5 percent in Calhoun County, a ten point spread across counties that sit within an hour of each other. The regional share, 19.1 percent, sits slightly above Missouri's 18.7 percent. That gap is small. The internal spread is not.

Statewide, the inversion is the whole story. Sorted by share, the top of Missouri is Stone County at 33.1 percent, Benton County at 32.4 percent, Hickory County at 32.1 percent and Camden County at 31.1 percent, the lake and Ozark tier. Sorted by count, St. Louis County leads at 199,345, then Jackson County at 120,879. Twenty five counties hold 73.0 percent of the state's older population. The twenty oldest counties by share hold 68,955 older adults, 5.9 percent of the state. Measured overlap between the top 20 by share and the top 25 by count is 2 counties, Camden and Stone. If you only read one ranking, you will describe the wrong Missouri.

The youngest-share end makes the same point from the other direction. Pulaski County is 10.1 percent aged 65 and over, then Johnson County at 13.9 percent and Boone County at 14.5 percent, counties with large institutional or student populations that pull the denominator up. Jackson County is 8th lowest by share at 16.6 percent and second in the state by count. St. Charles County is 20th lowest by share at 18.1 percent and second in the region by count. A low share is often a large county. It is not a county without older adults.

County totals are the unit. Municipality figures are not published here. The methodology page gives the reason in operational terms: place-level population by age comes from the American Community Survey rather than the population estimates programme, and that survey's data interface now requires a key. Requested without one it answers HTTP 200 and returns an HTML error page, which a parser will accept as data. There is no safe way to publish Ballwin, Chesterfield or Valley Park on that footing, so they are absent by decision, not by oversight.

If you need a town, you are past what this desk can verify. You still have the county row, which is the correct first geography, and you have the company's own service-area list, which is the correct second geography. Do not interpolate a town figure from a county figure. A county of 992,929 residents does not tell you the age structure of one suburb, and this desk will not pretend it does.

Nothing on this desk is a statement about health, care needs, diagnosis, disability, independence or treatment. The methodology page lists that among the things deliberately not published, alongside projections and provider quality. 535,836 residents aged 65 and over is a denominator. Most of those residents need no paid caregiver. Converting the count into a demand forecast would be a new model, and this desk does not model.

The business file has its own hard limit. NAICS 621610 mixes medical and non-medical home care. Establishments are counted where they are registered. Five counties have no row. Three have employment withheld. Seven have published jobs, totalling 8,318 in December 2024. A county with few establishments is not necessarily a county without providers, because a company based in one county serves several. Read the supply page as a registration map. Check a provider's published towns before you draw a conclusion about an address.

The desk also does not rate, score, certify or vouch for any provider, and it does not match a family to a company. One paid placement appears in a labelled box. It is a client of the publisher. It is not a data result.

Use county age data to locate the person in a published geography: which county, how large the older population is, how large the 85-and-over band is, how the county sits on share versus count, and how thin or dense the registered home care file is against the 65-and-over denominator. That is a briefing. It is enough to stop you treating St. Louis County, St. Charles County and Jefferson County as the same place, and enough to stop you treating a statewide share ranking as a map of where older adults actually live.

Do not use it to decide whether a house can hold a promise to stay home. Those are household facts. If you are managing them from another city, a distance-caregiving guide such as Far Away Daughter is the right next document. If the question is how to keep the person in that house, Keep Her Home is written for that question. Neither guide is a substitute for the county file.

When a figure on this desk disagrees with the source file, the source file is right. The Census Bureau's method is in the estimates methodology. The BLS method is the Quarterly Census of Employment and Wages. This desk's filters, joins and refusals to publish are on the methodology page. Read those before you quote a county number in a family meeting. The number will still be an age count. The meeting will still be about one person.