| Country: | Romania |
| Founded: | 2006 |
| Promotion: | Liga III |
| Relegation: | Liga V |
| Levels: | 4 |
| Domest Cup: | Cupa României Supercupa României |
| Current: | 2023–24 Liga IV |
| Website: | https://www.frf-ajf.ro/ |
Liga IV is the fourth level of the Romanian football league system and is run in all 41 counties and in the Municipality of Bucharest. It was known as the Regional Championship, County Championship, Divizia C – County Phase and Divizia D. Its name was changed into Liga IV before the start of the 2006–07 season.
Starting with 1950, the Romanian People's Republic was administratively and territorially reorganized into regions and districts,[1] each region having its own football championship. Between 1950-1956 and 1960-1963 it was the third tier in the Romanian football league system, as Divizia C was disbanded in those two periods.
Liga IV has 42 divisions. The divisions are regionalised and are organised by every county association. Each team plays in their own county. The county associations decide how many teams play in the league and how many matches each side plays. In Romania the most frequently used system is one division with matches played home and away. A number of associations prefer 2 or even 4 parallel divisions with the teams finishing first meeting in a play-off to decide the champion. The number of teams differ from one county association to another. The Mureș County association has the fewest teams, 8, which play in a Scottish system, playing 4 times against one another. The Dolj County association has 20 teams.
The champions of each county association play one another in a play-off to determine 21 teams that will promote to Liga III. Geographical criteria are taken into consideration when the play-offs are drawn. In total there are 41 county champions plus the Bucharest municipal champion.
At this level teams are not considered full fledged clubs but instead are "sporting associations". However teams that want to promote have to get a certificate declaring them to be a football club from the national federation.
Liga IV is divided in 42 series, one for each county. All county leagues are organized individually by every County Football Association (AJF), but under the supervision of the Romanian Football Federation.