Why the number of residents 85 and over matters most for planning

If you add the two columns, you double-count every resident aged 85 and over. The methodology page states this in those terms: AGE85PLUS_TOT is a subset of AGE65PLUS_TOT, not an addition to it. The region holds 535,836 residents aged 65 and over and 55,917 residents aged 85 and over. The second number is 10.4 percent of the first, and 1.99 percent of the region's 2,811,927 residents. Those three regional figures are the starting point. They describe July 1, 2024, not a projection.

The 65-and-over column is a wide net. It includes people still working, people who need no help of any kind, and people who already have a full roster of paid and unpaid support. It is the right denominator for a supply ratio, which is why this desk uses it on the establishment and jobs pages. It is a blunt instrument for household planning, because it mixes very different decades of life into one cell.

The 85-and-over column is still an age count, not a need count. It is a narrower age count. Families asking "where are the people most often in this conversation" are usually asking about that narrower band, whether they use those words or not. This desk publishes it so you can see the geography without inventing a caseload on top of it.

The 85-and-over page is a table rather than a ranking because a single sort would have to choose one column and pretend it answers the others. Count, share of total population, and share of the county's own residents aged 65 and over lead in different places.

By count, St. Louis County leads with 22,623 residents aged 85 and over, more than the next three counties combined. St. Charles County follows with 8,071 and Madison County, Illinois, with 5,589. If you are a provider planning routes, or a family trying to understand where the largest group lives, that is the column. It is also the column that tracks the 65-and-over ranking most closely, because the large counties are large in both bands.

By share of total population the order changes. Calhoun County, Illinois, leads at 2.70 percent on a base of 4,224 residents, then Macoupin County at 2.55 percent and Jersey County at 2.35 percent. St. Louis County places fourth on this measure at 2.28 percent. A small county can carry a high share on a small base. Calhoun County's 114 residents aged 85 and over is the smallest cell in the table and the one the 85-and-over page tells you to read most cautiously, because the smallest counties carry the widest relative uncertainty in an estimate.

By share of the county's own older population, St. Louis County and Macoupin County tie at 11.3 percent, with Clinton County, Illinois, next at 11.1 percent. Jefferson County reports 7.3 percent, the lowest internal share in the region. That third reading is the one that tells you whether a county's older population is stacked toward the oldest ages or still weighted toward the younger end of 65-and-over. It is the planning column when you already know the county and want to know its internal structure.

St. Louis County's 22,623 residents aged 85 and over is the fact that organises the map. The next counties, in the order the table already uses, are St. Charles County at 8,071, Madison County at 5,589, the city of St. Louis at 4,630, St. Clair County at 4,583, Jefferson County at 3,040 and Franklin County at 2,170. Below that the counts fall into four figures and then three. The geography of the oldest band is even more concentrated than the geography of 65-and-over, which already has St. Louis County at 37.2 percent of the regional total.

Concentration is a planning input, not a convenience. If the person you are planning for lives in St. Louis County, they live in the county that holds both the largest 65-and-over count and the largest 85-and-over count, and the densest published home care registration. If they live in Jefferson County, they live in a county with 3,040 residents aged 85 and over, the lowest internal 85-of-65 share in the region, and the thinnest computed establishment rate. Those are different starting points for a search. They are not different statements about any one household.

Missouri's statewide ratio of residents aged 85 and over to residents aged 65 and over is 10.7 percent. The regional figure is 10.4 percent. The highest county on that statewide ranking is DeKalb County, where 355 of 2,126 residents aged 65 and over are aged 85 and over, 16.7 percent. These are small northern counties, not St. Louis County, and every St. Louis region county sits below the top 45 of 115 on that page.

That inversion is the same pattern the share ranking already showed for 65-and-over. Stone County is 33.1 percent aged 65 and over, the highest share in the state, on a population of 32,630. The populous counties hold the counts. The small counties hold the shares. Nine of the 25 counties on the oldest-old page also appear in the statewide top 20 by share aged 65 and over; sixteen do not.

The Census Bureau builds these figures from a 2020 base updated with administrative records on births, deaths and migration. They are estimates. The Bureau documents the method in its population estimates methodology. The smallest 85-and-over cells are the ones to handle with the most restraint. This desk does not project them forward. Nothing on this site is a forecast.

It will not tell you who needs help. Age is not a proxy for need, diagnosis, disability, independence or living arrangement. The methodology page states that limit for the whole desk, and it applies hardest to this column because this is the column people are most tempted to treat as a caseload. 55,917 residents aged 85 and over is a population. It is not 55,917 people waiting for a caregiver.

It will not tell you who lives alone, who has a daughter in town, or who already has paid help. It will not tell you which of those residents are in a skilled facility and which are in a house. The Census estimates programme counts residents by age in a county. It does not count households by care status. This desk does not fill that gap with a guess.

It will not tell you which company to call. The supply join uses the 65-and-over denominator, not the 85-and-over denominator, and this desk has not published a separate 85-and-over supply ratio. Inventing one here would be new arithmetic. If you want supply, read the supply page as it stands. If you want the oldest population, read the 85-and-over table as it stands. Keep the two files next to each other rather than dividing them again.

Read your county's three 85-and-over figures in order: the count, the share of total population, and the share of residents aged 65 and over. Write them down. Then read the same county's 65-and-over count and its supply rate, if one was computed. You now have the size of the older population, the size of the oldest band, how stacked that band is, and how many home care offices are registered against the wider 65-and-over denominator. That is the briefing this desk can honestly give you.

If you are planning from another city, the 85-and-over count is still only an age count. The week-to-week work of checking on a parent you cannot see is a different document, which is why this page points you once to Far Away Daughter. If the plan is that the person stays in the house, the column tells you the size of the oldest band in that county, not whether the house can hold the plan. That household question is the subject of Keep Her Home.

Then stop. Do not convert the count into a wait time. Do not add counties together to make a region this desk did not publish. The source files, the YEAR 6 filter and the reason municipality figures are absent are on the methodology page. The table itself remains on the 85 and over page.