The 2018–19 season was the 73rd season in HNK Rijeka's history.

It was their 28th successive season in the Croatian First Football League, and 45th successive top tier season.

Source: Competitive matches Source: 2018–19 Croatian First Football League article Source: Croatian Football Federation[3] Source: Croatian Football Federation[3] Source: uefa.com Updated 25 May 2019.

Competitive matches only.

Source: Competitive matches Source: Competitive matches Source: nk-rijeka.hr Source: nk-rijeka.hr Source: Glasilo Hrvatskog nogometnog saveza Source: Glasilo Hrvatskog nogometnog saveza Spending: €800,000 Income: €12,580,000 Expenditure: €11,780,000