| Mahnar Bazar | |
| Native Name: | महनार बाजार |
| Native Name Lang: | hi |
| Other Name: | Maharar |
| Settlement Type: | Town |
| Pushpin Map: | India Bihar |
| Pushpin Map Caption: | Location in Bihar, India |
| Coordinates: | 25.6038°N 85.4923°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Type2: | District |
| Subdivision Name1: | Bihar |
| Subdivision Name2: | Vaishali |
| Unit Pref: | Metric |
| Population Total: | 78679 |
| Population As Of: | 2018 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 844506 |
| Blank1 Name Sec1: | Lok Sabha constituency |
| Blank1 Info Sec1: | Hajipur |
| Demographics1 Info1: | Bajjika, Hindi |
| Blank2 Name Sec1: | Vidhan Sabha constituency |
| Blank2 Info Sec1: | Mahnar |
Mahnar Bazar is a municipality, block and sub-division in Vaishali district of Bihar state in India. It is also the main market to all nearby ward areas and villages. Mahnar comes under Hajipur Lok Sabha constituency. It is a Nagarpalika divided into many wards. It has its own police station and land registration office. The area has well-equipped government hospital and animal hospital.
India census,[1] Mahnar Bazar had a population of 37,354. Males constitute 52% of the population and females 48%. Mahnar Bazar has an average literacy rate of 43%, lower than the national average of 59.5%: male literacy is 52%, and female literacy is 33%. In Mahnar Bazar, 20% of the population is under 6 years of age.