The Regional State Administrative Agency for Southern Finland () was one of the six Regional State Administrative Agencies. Its administrative area consisted of five regions, 16 sub-regions, and 88 municipalities.
The operations of the Regional State Administrative Agencies ended on 31 December 2025, when the (, LVV) was established on 1 January 2026.
Regions South Karelia (Etelä-Karjala/Södra Karelen) Päijät-Häme (Päijät-Häme/Päijänne Tavastland) Kanta-Häme (Kanta-Häme/Egentliga Tavastland) Uusimaa (Uusimaa/Nyland) Kymenlaakso (Kymenlaakso/Kymmenedalen)
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