# Austrian demographic and birth rate trends > Live situation record from CLSTR: https://clstr.news/situations/austrian-demographic-and-birth-rate-trends > Updated: 2026-09-25T21:55:04.000Z. Sources: 21. Developments: 2. Demographic data from Austria highlights various population trends. In the states of Vorarlberg and Salzburg, significant portions of the population possess migration backgrounds, with Vorarlberg seeing a slight decrease to 28.6% in 2025. Nationally, population growth is driven primarily by immigration, as deaths have exceeded births since 2020. Additionally, seasonal fluctuations in birth rates have been observed. Data indicates a significant spike in births during late September, specifically peaking around September 26th. Demographers suggest these peaks are linked to increased leisure time during the Christmas holiday season nine months prior. ## Claims - The calendar entry for September 26 highlights various historical events, birthdays, and deaths. (corroborated by 4 sources) - In the 2021 German federal election, the CDU/CSU received 24.1 percent of the votes. (corroborated by 4 sources) - In 2016, Colombian President Juan Manuel Santos and Farc commander Rodrigo Londoño signed a peace treaty in Cartagena. (corroborated by 4 sources) - Boeing delivered its first 787 Dreamliner long-haul jet in 2011. (corroborated by 4 sources) - Fritz Henkel founded Henkel & Cie in Aachen in 1876. (corroborated by 4 sources) ## Timeline ### 2026-09-25: Austria experiences significant September birth rate spike Austria sees a significant birth spike in late September, driven by the Christmas holiday season, according to demographic data and experts. 19 sources. https://clstr.news/cluster/september-26-historical-milestones-peace-treaties-elections-and-industry ### 2026-09-12: Demographic shifts reported in Vorarlberg and Salzburg Demographic data shows Vorarlberg's migration background share fell to 28.6%, while Salzburg maintains high concentrations in urban and tourist areas. Austria's population growth is now driven by immigration. 2 sources. https://clstr.news/cluster/demographic-shifts-reported-in-vorarlberg-and-salzburg --- Cite as: Austrian demographic and birth rate trends. CLSTR, https://clstr.news/situations/austrian-demographic-and-birth-rate-trends