Ladnun is a city and municipality in the Didwana-Kuchaman (earlier Nagaur) district of Rajasthan. It is located about 380 km from Delhi and around 210 km north-west of Jaipur, well connected by road and rail to major cities.

The presence of Jain Vishva Bharati and related institutions makes Ladnun an important spiritual and educational destination.

As per the 2011 Census, Ladnun had a population of about 65,500, with steady growth in recent years.

Agriculture is the main occupation in Ladnun and surrounding villages, with major crops including bajra, wheat, pulses, til, and barley. Small-scale industries such as agricultural machinery, woodcraft, textile dyeing/printing, papad-badi products, khadi and handloom also support the local economy.