The Returning Officer for the constituency, Dr Uche Nriagu, announced the result at the INEC Collation Center in Amawbia-Awka.
Orogbu garnered 34,713 votes, beating her closest rival, Obi Nwankwo of the All Progressives Grand Alliance (APGA), who secured 24,814 votes.
The other candidates scored as follows: Emeka Igwe of the PDP got 21,850 votes, while YPP scored 2047, NNPP 244, ADC 108, NRM 33, and SDP 43.
Orogbu is a lecturer at Nnamdi Azikiwe University, Awka, and is the first woman to represent the constituency in the House of Representatives.