Ask UK census data anything, get answers in seconds
CensusWise turns Census 2021 into a tool you can actually use. Type a question in plain English — get population breakdowns, deprivation indices, and demographic profiles for any area in England & Wales.
Ask a real question, get real data
No signup needed. Type a question about any area in England & Wales — or click a suggestion. CensusWise queries the ONS Census 2021 data and gives you a sourced, data-backed answer.
2 free queries so you can see exactly what you're buying before you pay.
- What is the ethnic breakdown of Birmingham?
- Compare deprivation in Leeds vs Sheffield
- Population by age near postcode E1 6AN
- Which region has the most over-65s?
Not another stats portal. CensusWise answers the questions you'd normally spend hours finding on Nomis or ONS.
Housing & planning officers
Get demographic profiles for wards and LSOAs in seconds. No more digging through Nomis bulk downloads.
Planning consultants
Populate community profiles and deprivation assessments for planning applications — backed by official data.
Journalists & researchers
Fact-check demographic claims instantly. Compare areas. Get the exact Census 2021 figure for any region.
Property & retail analysts
Understand the demographic profile of any catchment area from a postcode. Map customers to census data.
Ask your question
Type in plain English. "What is the population of Leeds by ethnic group?" — no codes, no filters, no API keys.
We query the data
CensusWise translates your question into Census API calls. It finds the right dataset, geography, and categories automatically.
Get a sourced answer
Every number comes directly from ONS Census 2021 data. No AI hallucination — the model only narrates what the data says.
Census data is public under the Open Government Licence. But extracting useful answers from Nomis or the ONS API takes hours. Incumbents charge eye-watering fees for the same underlying data.
| Feature | CensusWise Pro | Incumbents |
|---|---|---|
| Price | £29/month | £5,000–50,000/yr (CACI Acorn, Experian Mosaic) |
| Natural language queries | Unlimited | Not available |
| Data source | Census 2021, ONS, IMD | Same public data + proprietary models |
| Time to answer | < 10 seconds | Hours (manual CSV/Nomis) |
| Commitment | Cancel anytime | Annual contract |
| Visual explorer | Free, included | Additional licence fees |
Start with the free explorer. Upgrade when you need AI.
Browse national and regional census data for free — no account needed. When you want to ask questions in plain English, Pro gives you unlimited AI queries for £29/month.