Data from the Australian Bureau of Statistics showed the number of people working more than one job fell by 1.2 per cent in the June quarter.
The figures showed 961,000 people working in different jobs.
However, the number of secondary jobs remains 25 per cent higher compared to the September quarter in 2021.
The bureau's head of labour statistics Kate Lamb said the fall in people working more than one job followed a decrease in other jobs figures.
"The drop in the number of people working multiple jobs coincided with a 2.9 per cent decline in secondary jobs in the labour market in the June quarter," she said.
"This was the largest fall in secondary jobs since September quarter 2021, when public health measures were introduced in response to the COVID-19 Delta variant."
While there was a drop in secondary jobs, the number of primary jobs rose by 0.6 per cent in the last quarter.
The bureau figures also showed the rate of people working multiple jobs fell to 6.5 per cent, down from the record high of 6.7 per cent in the first three months of the year.
"This is the lowest multiple job-holding rate we've seen since the September quarter 2022," Ms Lamb said.
"However, 6.5 per cent remains high compared to before the COVID-19 pandemic, when the rate of multiple job-holding was usually between five and six per cent."
The data came following figures released on Wednesday that showed the national economy grew by just 0.2 per cent in the three months to June.
Outside of the pandemic, the annual growth rate was the lowest since 1991/92, when Australia was in a recession.