This article discusses the process of French imperialism in Algeria from the invasion of 1830 to its impact on the political, economic, educational, and religious life of the local community. The background of this study is based on the contradiction between France's claim to liberate Algeria from Ottoman rule and the reality of colonial practices that were fraught with interests in power and economic expansion in North Africa. The method used is a historical research method that includes four stages: heuristics (collecting relevant historical sources), criticism (testing the validity of sources), interpretation (interpreting data), and historiography (writing history systematically). Data collection techniques are carried out through literature studies of various primary and secondary sources. Descriptive analysis is carried out by describing the cause-and-effect relationships of the implemented colonial policies. The results of the study show that after controlling Algeria, France implemented repressive policies such as changes to the government system, marginalization of Islamic-based education, the elimination of Arabic language and culture, and economic exploitation through land confiscation. The resulting impacts included socio-economic inequality, discrimination against the indigenous population, and a humanitarian crisis resulting from mass deaths due to violence, famine, and disease outbreaks. The discussion emphasizes that French imperialism was not only physical but also structural and cultural, aimed at eradicating Algerian national identity. In conclusion, French imperialism in Algeria was a comprehensive form of colonialism that had a broad and lasting impact on the lives of local communities.