Dighi Union (Bengali: দিঘী ইউনিয়ন) is union parishad under Manikganj Sadar Upazila of Manikganj District, Bangladesh.

Dighi Union is located at 23°52′20″N 89°57′57″E / 23.8721°N 89.9659°E / 23.8721; 89.9659. It has a total area of 2,601 acres (10.53 km).

According to the 2011 Bangladesh census, Dighi Union had 4,629 households and a population of 20,094.

There are total 4 Haats and Bazars. Besides 8 fairs (Mela) are held in Dighi Union. Tara Bazar, Dautia Bazar, BoT Tola Bazar(Bangla) are famous bazar in Dighi Union.

Dighi Union has 26 rural, The Rural are - Muljan, Vatbaour, Dighi, Bagzan, Romonpur, Gulotia, Susunda, Dayotia, khagrakuri, Rohadoho, Kutai, Chamta, Notun bosti, Bot-tola 29 Mauzas/Mahallas, and 36 villages.

National Highway 5 Dhaka-Bangladesh Highway. N5 (Bangladesh)

Kaliganga River

Dighi Union has 2 College, 3 Secondary School, 7 Primary School, 1 Bank, 1 Union Health Center, 1 Protibondhi institute, 1 Electricity Institute, 1 Bus Station.

Among the educational institutions.

• Manikganj Medical College
• Garpara Hafiz Uddin Degree College.

• Muljan High School, Manikganj
• Government Textile Vocational Institute Manikganj
• Dautia Garpara Rahima Hafij High School.