Young households, renting, with children in them. Nearly half the homes here hold a couple and their kids. The typical resident is in their twenties. Barely one household in four owns anything. Larkhill does not grow older, it gets replaced.
Tenure is the number that defines the place. The 2021 Census, which is the source for the population figures throughout this answer, puts owner-occupiers at about 24% of households, private renters at about 65% and social renters at about 11%. Renting at that level would be unremarkable in a city centre and is genuinely unusual in a village surrounded by chalk downland. Whatever else this place is, it is not a village of people who bought and stayed.
The age profile follows from it. The median resident is 28, and about 46% of people are aged between 25 and 44. That puts most of the adult population squarely in the middle of their working lives rather than at either end of them, which is the opposite of the demographic most rural postcodes are carrying.
Income is comfortable and worth dating properly. Modelled median household income for this area was about £70,000 gross before tax in the financial year to March 2023, or roughly £49,500 once tax comes out. That figure describes that year rather than this one. It also describes households that are overwhelmingly renting rather than buying, which is not the pairing most people expect at that income level.
Household make-up says the rest. About 46% of households are a couple with dependent children and about 5% are a lone parent. About 15% are one person living alone, and about 3% are a pensioner living alone, which is a subset of that figure rather than an addition to it. Three percent tells you something plainly: almost nobody retires here.
On qualifications, about 28% hold a degree-level qualification, about 9% hold none at all, and about 1% are full-time students. That last number rules out the usual explanation for a young median age. What none of these figures capture is the training people here actually hold, which is the standing weakness of a survey that asks about certificates.
Health reads well. About 94% of residents describe their health as good or very good, and about 2% as bad or very bad. At the wider Wiltshire level rather than this village's own, the preventable mortality rate is better than the England average and smoking prevalence, at about 8% of adults, is similar to England. Those are council-area measures with a national benchmark attached, not a reading of this postcode.
One structural detail changes how the household numbers should be read. Of the 4,564 residents, about 3,852 live in private households and about 712 live in communal establishments. Every share above describes the first group. The second group is large enough that the household figures describe most of Larkhill rather than all of it.
Young, working, mid-career and in good health: on the measures that describe a population rather than a place, this one reads strongly. What it does not offer is permanence, and nobody moving here was under the impression it did.