The purpose of the current study was to examine whether the relationship between childhood family income and risk of violent victimization has changed between 1988 and 2007 in Finland, as prior studies have suggested that socioeconomic differences in exposure to violence have increased during the recent decades. Existing studies have mostly relied on survey data, while such trends in hospital discharge data—a data source that covers the total population well and is not compromised by attrition or self-report bias—have not been thoroughly investigated before. The current study used register-based individual-level data from 1988-2007 (n = 283,505) to study changes in the relationship between childhood family income and victimization risk among 15- to 30-year-old Finnish men and women. We found a persisting difference in violent victimization between the top and bottom income quintiles for both men and women. While the estimates suggest that this difference has increased rather than decreased during the observation period particularly among women, this change was not statistically significant. These conclusions remain after controlling for the composition of income quintiles. Research could benefit from more extensive use of administrative hospital records in analyzing of the trends and causes of serious violence.