| Provisional National Assembly | |
| Coa Pic: | Imperial Coat of Arms of Austria.svg |
| Coa Res: | 150 |
| Coa Caption: | Lesser coat of arms of Cisleithania (1915–1918) |
| House Type: |
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| Foundation: | 21 October 1918 |
| Disbanded: | 16 February 1919 |
| Preceded By: | Imperial Council |
| Succeeded By: | Constituent National Assembly |
| Leader1 Type: | Presidium |
| Leader1: |
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| Members: | 208 |
| Structure1: | Provisional National Assembly composition.svg |
| Structure1 Res: | 250 |
| Political Groups1: |
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| Last Election1: | June and July 1911 |
| Next Election1: | 16 February 1919 |
| Session Room: | Provisorische Nationalversammlung für Deutschösterreich am 21. Oktober 1918.jpg |
| Session Res: | 260 |
| Meeting Place: | First meeting on 21 October 1918 |
The Provisional National Assembly (German: Provisorische National Versammlung), unofficially also referred to as the Vienna National Assembly, was the first parliament of the Republic of German-Austria. It functioned during and after the collapse of the Austro-Hungarian Empire from 21 October 1918 to 16 February 1919. The last meeting took place on 6 February 1919 when the Geschäftsordnung for the Constituent Assembly was adopted. The assembly was composed of the members of the Chamber of Deputies of the former Imperial Council, who had represented the German-speaking areas of the Austrian half of the dual monarchy. It therefore also involved delegates whose territories were not allowed to join German-Austria because of the Treaty of St. Germain. The 208 deputies were all men; in the elections of 1911 women had not been eligible to vote yet.