We study intra-party polarization of parliamentary speech in Finland over a long time period of more than 100 years (1907-2018) using automated text analysis and the polarization measure introduced in Gentzkow et al. (2019). In addition to estimating intra-party polarization, we describe demographics of Finnish MPs over time, and how the share of speech by different demographic groups has evolved in the Finnish parliament during the last century. We find significant polarization by gender and university education but no polarization by age, white-collar job, Helsinki and Uusimaa region, or first-term MP status.