Valkas apriņķis (German: Kreis Walk, Russian: Валкский уезд) was a historic county in the Governorate of Livonia, and in the Republic of Latvia dissolved during the administrative territorial reform of the Latvian SSR in 1949. Its capital was Valka (Walk).
After the establishment of the Republic of Latvia in 1918, the Valkas apriņķis existed until 1949, when the Council of Ministers of the Latvian SSR split it into the newly created districts (rajons) of Valka and Smiltene (dissolved in 1959).
At the time of the Russian Empire Census of 1897, Kreis Walk had a population of 120,585. Of these, 87.9% spoke Latvian, 7.2% Estonian, 2.1% German, 1.3% Russian, 1.1% Yiddish, 0.2% Polish and 0.1% Romani as their native language.
- "Letonika.lv. Vārdnīcas - Latviešu—angļu vārdnīca. Apriņķis = district or county". www.letonika.lv. Retrieved 2019-10-14.
- Первая всеобщая перепись населения Российской Империи 1897 г.