The 73 constituencies in 2024 correspond to those defined for the 2021 Scottish Parliament elections. From 2025 onwards, the constituencies correspond to those defined in the Scottish Parliament (Constituencies and Regions) Order 2025, i.e. those used in the May 2026 Scottish Parliament elections. Each Data Zone has been assigned to a constituency based on a ‘best-fit’ basis. Where a Data Zone crosses the boundary of two (or more) constituencies it was assigned to the constituency containing the population-weighted centroid of the Data Zone.