First County Football League (Croatia)
|Level on pyramid||4|
|Promotion to||Treća HNL|
|Relegation to||Second County Football League|
|Domestic cup(s)||Croatian Cup|
The teams are divided into 9 county or inter-county subdivisions, competing in a double round-robin format. At the end of each season, the bottom teams are relegated to the respective county's Second league while the winners of each league are either promoted directly to Treća HNL or enter a two-legged playoff to gain promotion.
- There used to be a fourth tier Croatian National League, the Četvrta HNL (4. HNL), but it was dissolved in 2012.
- "68 Countries Represented in Croatian First Football League To Date". www.total-croatia-news.com. Retrieved 2 May 2019.