The Sporting Kansas City striker took home the award after recording three goals and two assists in May.
The Hungarian striker’s three goals and two assists in five appearances helped him earn 34.95 per cent of the votes to win the individual accolade over the likes of Toronto FC playmaker Sebastian Giovinco and Seattle Sounders star Clint Dempsey.
In addition, the former Liverpool trainee’s performances also helped Sporting KC record three victories and two draws over the course of the month, as he received an international recall for his nation’s upcoming games against Lithuania and Finland.
Nemeth, 26, had been without a club for five months prior to joining SKC in December, having left Dutch outfit Roda JC on a free transfer after scoring eight times in 25 games during the 2013-14 campaign.
With six goals in his first 11 MLS matches, the 15-times capped forward has proved a valuable addition to Peter Vermes’ side thus far and had shown glimpses of the skill which first earned him a move to Liverpool from MTK Budapest in 2007.
While he never managed to make a first-team appearance for the Reds before leaving for Olympiakos in 2010, he looks set to make a much bigger impact in the States, with his presence alongside fellow front man Dom Dwyer in the SKC line-up ensure that the club have more than enough firepower to mount a serious challenge for the 2015 MLS Cup title.