|Number of teams||10|
|Level on pyramid||2|
|TV partners||VeikkausTV, Huuhkaja.tv|
Ykkönen (Finnish for 'Number One'; Swedish: Ettan) is the second highest level of the Finnish football league system (after the Veikkausliiga), although it is the highest league managed by the Football Association of Finland.
The first league format competition in the second level of Finnish football was called Suomensarja, which was founded in 1936. Before the inauguration of the Suomensarja, from 1930 to 1935, there had been special qualification matches for the right to play in the Mestaruussarja.
In 1973, this level of football in Finland became nationwide, and the new name was 1. divisioona (‘First Division’). Name Ykkönen has been used since 1995.
Like the Veikkausliiga, the first division is played mainly during the summer. It comprises 10 clubs, all of whom play three matches against all other clubs in the division. The winner of the Ykkönen qualifies directly for promotion to Veikkausliiga, and the team finishing second in the league will play a two-legged promotion playoff against the team finishing 11th in the Veikkausliiga. The bottom 2 clubs are directly relegated to Kakkonen.
The clubs in the Ykkönen for the 2018 season are:
|AC Kajaani||Kajaani||Kajaanin liikuntapuisto||1,500||Mika Lumijärvi|
|AC Oulu||Oulu||Raatin Stadion||6,996||Mika Lähderinne|
|Ekenäs IF||Raseborg||Ekenäs Centrumplan||800||Gabri Garcia Xarart|
|Haka||Valkeakoski||Tehtaan kenttä||3,516||Keith Armstrong|
|Jaro||Jakobstad||Jakobstads Centralplan||5,000||Tomi Kärkkäinen|
|HIFK||Helsinki||Telia 5G -areena||10,770||Teemu Kankkunen|
|JJK Jyväskylä||Jyväskylä||Harjun Stadion||5,000||Juha Pasoja|
|Klubi 04||Helsinki||Telia 5G -areena||10,770||Mikko Mannila|
|KPV||Kokkola||Kokkolan Keskuskenttä||2,000||Jarmo Korhonen|
|KTP||Kotka||Arto Tolsa Areena||4,780||Jari-Pekka Gummerus|