Araihazar (Bengali: আড়াইহাজার) is an upazila (sub-district) of the Narayanganj District in Bangladesh, part of the Dhaka Division.

[4] Araihazar is named after the leftover 2,500 Mughal soldiers of Man Singh I that fought with Isa Khan in the 17th century.

In 1921, a thana (police outpost administrative headquarters) was established in Araihazar, under the former Dhaka district.

Araihazar Thana's status was upgraded to upazila (sub-district) in 1983 as part of the President of Bangladesh Hussain Muhammad Ershad's decentralisation programme.

Araihazar had a literacy rate (age 7 and over) of 41.0%, compared to the national average of 51.8%, and a sex ratio of 999 females per 1000 males.