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|Established||24 May 1984|
The decision to create the museum was taken in 1984 by the Municipality of Loznica, which decided on the building of "Old Pharmacy" to make it the city museum. The museum was opened on 14 September 1987 with a ceremony honoring two centuries of Vuk Stefanović Karadžić.
Jadar Museum has a permanent collection dedicated to man's activities in the area of Loznica of prehistory until 1950. The setting is enriched with years and now has 171 archaeological objects, 410 ethnological, historical 516, 195 numismatic and more than 1500 documents and photos. In addition to the permanent exhibition at the Jadar Museum occasionally displayed temporary exhibitions, about 10 per year for 10 to 12 days.