The Union information and broadcasting minister also thanked the voters of Amethi for reposing faith in the saffron party.
Irani had unsuccessfully contested the 2014 Lok Sabha election from Amethi against Gandhi.
"Congratulations to the dedicated workers from Amethi region for the #VikasKiJeet (victory of development). Thanks to people of Amethi for blessing @BJP4India (sic)," she wrote on Twitter.
In another tweet, the Union minister thanked the voters and BJP workers for the "historic" victory of the party's mayoral candidate, Mahesh Sonkar, in Jais.
Union Minister of State for Information and Broadcasting Rajyavardhan Rathore also hailed the party's victory.
"People have resoundingly chosen development! Congrats to @BJP4UP & @myogiadityanath ji for a massive victory in #UPCivicPolls2017! The people have spoken. The mandate is overwhelmingly for PM @narendramodi ji's agenda of "sab ka saath, sab ka vikas"! (sic)," he tweeted.
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