We introduce KnowledJe, an English-language knowledge graph of antisemitic history and language from the 20th century to the present. Structured as a JSON file, KnowledJe currently contains 618 entries, which consist of 210 event names, 137 place names, 95 person names, 80 dates (years), 38 publication names, 27 organization names, and 1 product name. Each entry is associated with its own dictionary, which contains descriptions, locations, authors, and dates as applicable. We obtain the entries through four Wikipedia articles: “Timeline of antisemitism in the 20th century,” “Timeline of antisemitism in the 21stcentury,” the “Jews” section of “List of religious slurs,” and “Timeline of the Holocaust.” To obtain descriptions for each applicable key, we used the following general rules: 1. If the concept associated with the key is a slur, the description is the entry in the “Meaning, origin, and notes” column of the “List of religious slurs” article. 2. Otherwise, if the concept associated with the key has its own Wikipedia page and that Wikipedia page has a table of contents, the description is the body of text above the table of contents. If the page exists but does not have a table of contents, the description is the first paragraph of the text on the page. 3. Otherwise, the description is the paragraph given directly under the listing of the year of the event in the Wikipedia article in which the concept was first found. We edit descriptions to remove non-Latin characters and citations. For concepts with multiple names, we create separate keys for each name. Potential use cases: enhancing hate speech detection algorithms for antisemitism, extracting knowledge of historical antisemitism. See paper (https://arxiv.org/abs/2304.11223) for examples and further description. See GitHub repo (https://github.com/enscma2/knowledje) for data files.