The calculated distance (air line) between Balassagyarmat and Józsefváros is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Józsefváros is certainly longer, as only the direct route (as the crow flies) between Balassagyarmat and Józsefváros has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles