Following his headed goal in the dying moments at Birmingham City last month, Cahill now has 27 headed goals in 174 appearances in the top flight.
He said: “It came as a bit of a surprise to me to find out, but it is something I am very, very proud of.
“It is massive honour, but it isn’t something that happens on its own.
“Players like Phil Neville and Mikel Arteta, the whole team in fact – they all provide me with the opportunities to score. So as long as I can keep doing it, great.
“I suppose I started young and scored a lot of headed goals as a youngster and I worked hard. I was scoring goals with my head long before I was at Everton, even before Millwall, when I was back in Australia.”