Cardiff business data and market evidence
Official registered-enterprise and population counts for the Cardiff local authority district (LAD). The all-industry enterprise total is the official Nomis total cell for the stated data year, not the sum of rounded SIC sections. Section rows below are broad industry groups and do not add up to that total. Figures are observed benchmarks, not a recommendation to start or expand here.
Data year: 2025 · Snapshot updated 2026-09-05
Evidence summary
Cardiff had 11,825 registered businesses and a resident population of 381,516 in the latest frozen snapshot. Business density was 31 businesses per 1,000 residents. Year-on-year registered-business change was 0.4%; population change was -0.1%.
Figures cover the Cardiff local authority district, not a street or catchment radius. Counts are registered enterprises, not footfall, spend, or trading capacity. The all-industry total is the official Nomis total cell when available for the current reference period.
- Population
- 381,516
- Population change (year on year)
- -0.1%
- Registered businesses
- 11,825
- Businesses per 1,000 residents
- 31
- Registered-business change (year on year)
- 0.4%
ONS mid-year population estimates (2025 data year)
ONS mid-year population estimates (2025 data year)
Nomis UK Business Counts (2025 data year) · local authority district
Nomis UK Business Counts (2025 data year) with ONS mid-year population estimates (2025 data year)
Nomis UK Business Counts (2025 data year) · counts, not trading volume
Professional, scientific and technical activities has the largest registered-business count
SIC (Standard Industrial Classification) sections ordered by local registered-business count. Largest SIC sections by registered-enterprise count from Nomis. Section counts are rounded published cells and do not sum to the official all-industry total. Observed size only, not a recommendation.
Registered businesses by SIC section
Cardiff local authority district · 2025
Sector SIC section Business count Year-on-year change Professional, scientific and technical activities M 1,960 0.5% Wholesale and retail trade; repair of motor vehicles G 1,700 -2.3% Construction F 1,345 1.5% Administrative and support service activities N 1,005 -0.5% Information and communication J 975 1.6%
What this evidence can tell you
- How many registered businesses and residents the local authority district had in the stated data year.
- How registered-business counts and population changed year on year at district level.
- Which SIC sections have the largest registered-business counts locally.
- Where public data stops, before demand, rent, footfall or street-level competition.
What it cannot tell you
- Customer demand, willingness to pay, or footfall at a specific address.
- Commercial rent, vacancy, or whether a sector is “saturated” for your idea.
- Trading performance, revenue, or survival probability for your plan.
- Whether you should proceed. Decised does not issue approval or success scores.
Sources and provenance
Nomis UK Business Counts (enterprises)
Publisher: Nomis / ONS· Geography: Local authority district· Data year: 2025· Licence: Open Government Licence (typical for these releases; confirm on source page)
Limitations: Registered enterprises. Does not measure demand, rent, or trading capacity. Sector rows are broad SIC sections.
Official sourceONS mid-year population estimates
Publisher: Office for National Statistics· Geography: Local authority district· Data year: 2025· Licence: Open Government Licence (typical for these releases; confirm on source page)
Limitations: Resident population, not daytime or visitor population.
Official source
Allowlisted city snapshot from Nomis UK Business Counts (enterprises) and ONS mid-year population estimates for the local authority district. The published all-industry enterprise total uses the official Nomis total cell, not the sum of rounded SIC sections. Sectors listed are the largest by registered-enterprise count, not a recommendation of what to start. Crime, news, custom searches, and cash forecasts are not included.
Related city evidence profiles
Property research for Cardiff
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