Census judgment (Volkszählungsurteil)

Data protection glossary · 1 minute read

The census judgment is the decision of the Federal Constitutional Court of 15 December 1983 which established the right to informational self-determination.

Background

The occasion was the 1983 Census Act, which provided for a comprehensive collection of data about the population. Numerous constitutional complaints were lodged against the Act. The Court declared parts of it unconstitutional, and the census finally took place in 1987 on a new legal basis.

Key findings

Under the conditions of automated data processing, there is no longer any such thing as insignificant data. Every individual must, in principle, be able to decide for themselves on the disclosure and use of their data.

Restrictions require a clear statutory basis and must be proportionate. The judgment shaped principles such as purpose limitation and legal clarity that still define data protection law today.

BVerfG, judgment of 15 December 1983
1 BvR 209/83 et al., BVerfGE 65, 1.
Art. 2(1) in conjunction with Art. 1(1) GG
General right of personality as the constitutional basis.

Last updated: September 2026

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Dr. Georg Schröder, LL.M. · Managing Director, Lawyer, Data Protection Officer

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