The latest gaming machine proceeds data from the Department of Internal Affairs shows Whanganui spent an extra $187,000 on pokies over the past year, compared to the same period in 2018.
The year to March 2019 total spend was slightly under $10.5 million.
The first three months of the year saw $2.4 million go into the district's pokies, which was down $46,000 compared to the first three months of 2018.
Whanganui mayor Hamish McDouall said the amount being spent was a shocking figure.
"It's absolutely staggering, I can't help but be quite shocked and concerned about that.
"It's shocking considering