Hariwan or Harion (Nepali: हरिवन) is a town and municipality in Nepal, located in Sarlahi District.

Harion Municipality is broadly divided into Chure range, Bhabar and Outer Terai.

Other trees found in the municipality are khayer, Sissou, Karma, Kumni, Harro, Barro, Sindure, Tantari, Sanisal, Simal, Bhurkul, Dabdabe, etc.

People of Harion Municipality mainly depend upon traditional fuel type for cooking.

According to census 2011 AD, about 80.31% of people in Harion Municipality use firewood as cooking fuel.

People of Harion mainly depend on electricity, kerosene lamps, biogas, solar energy for lighting purpose.

In 2019, current situation whole municipality is declared as open defecation free.

Harion municipality is widely known for Indushankhar Chini Udyog(Mega Suger factory), which is one of the biggest industries in Nepal.

Formed in the year 1984, it is the oldest and first privately owned sugar mill of Nepal which is considered as the backbone of Harion economy.

The plant produces high quality sugar and its biproduct with a production capacity of 36,650 MT.

[6] Harion has a permanent market area which houses shops for garment, hardware, cosmetics, department stores, DVD rentals, travel agencies, grocery store, hospital, cooperative finance companies, a couple of major banks and their ATMs.

With each passing day the number of shops in the market are growing along with the quality and variety of products that they offer.

Due to this most long route buses plying to major hubs in the country like Kathmandu, Pokhara, Birgunj, Biratnagar, Nepalgunj pass through Harion and so one can easily catch a bus to all the major parts of the country from Harion.