# Household size derivation

Indicates whether the household size was directly sourced from household records or inferred from similar households.

- API name: `household_size_derivation`
- Category: Demography
- Type · unit: Text
- Individuals with a value: 257.6M (100.0%)
- Latest collection: Jun 1, 2026, refreshed every two months
- How values combine: Read from a single source field.

## Links

- [Catalog page](/catalog/v2/household_size_derivation)
- [Published statistics (JSON)](https://static.faraday.ai/figv2/household_size_derivation.json)
- [API reference](/docs/reference/getattribute)