He beat competition from Labour, Green, Lib Dems, UKIP and TUSC to take the seat for a second term.
Conservatives received a 50% share of the vote.
In his acceptance speech, Mr Blackman praised the police for allowing the vote to take place and extended his thanks to many.
He said: “It is truly a privilege to represent the people of Harrow East, the most multi-cultural and multi-faith constituency in the country.
“I would like to thank the voters for having confidence in me. I commit myself to represent them to my utmost ability.”
Nick Hurd, who held his seat in Ruislip, Northwood, Pinner tweeted: “Congrats to @votebobblackman for a tenacious campaign in the face of a very nasty campaign against him. Great win.”
Labour's disappointment could not be hidden as they had high hopes for taking the seat, after receiving a 40% share with 19,911 of votes,
Uma Kumaran, Labour candidate, said after the result: “I can't even think about standing up let alone standing again.”
UKIP’s Aidan Powlesland took 2,333 whilst Lib Dem Ross Barlow received 1,037 votes.
Green Party’s Emma Wallace received 846 and Trade Unionist Nana Asante polled a total of 205.