The Belgian scooped the award ahead of Alvaro Morata, David Silva, Kevin De Bruyne, Sergio Aguero and Harry Kane who were also nominated:
Winner of the Premier League @BristolStMotors PFA Fans' Player of the Month is @ManUtd’s @RomeluLukaku9! #PFAawards https://t.co/kEGmQkg2gn2017-10-4 08:00:00
The Belgium international has been a huge hit since his summer transfer from Everton. His goals have helped propel Manchester United towards the top of the Premier League table, level on points with Manchester City.
The striker's impressive domestic form is highlighted by Squawka:
Squawka Football @Squawka
Romelu Lukaku's September by numbers in the Premier League: 4 games 9 shots on target 6 chances created 4 goals 1 assist 🔴 https://t.co/JKkvAPEvhj2017-10-4 09:35:55
As noted by Opta, Lukaku's start to life at Manchester United is almost unparalleled:
7 - No player has scored more goals in their first 7 @premierleague apps for @ManUtd than Romelu Lukaku (7, level with Andrew Cole). Heaven. https://t.co/fcsfhDfbdw2017-9-30 15:43:04
The 24-year-old has added pace and power to the United attack and a certain ruthlessness that was lacking last season.
Adam Joseph has also highlighted how effective the combination of Lukaku, Anthony Martial and Marcus Rashford has been for Manchester United this season:
Adam Joseph @AdamJosephSport
Anthony Martial, Marcus Rashford & Romelu Lukaku have already combined for 20 goals this season before the end of September. Incredible.2017-9-27 20:46:36
Lukaku was outscored by Tottenham Hotspur striker Kane, who finished the month with 13 goals for club and country, as noted by Opta:
13 - Harry Kane now has 13 goals for club & country in September 2017; his best ever goal tally in a single month of his career. Unstoppable https://t.co/Bt0mrkDJjP2017-9-30 11:57:16
However, that does not appear to have impressed supporters who have gone for Lukaku, who is also the Premier League's leading goalscorer going into the international break.