The 2013 Ykkönen season began on 29 April 2013 and ended on 5 October 2013. The winning team was directly promoted to the 2014 Veikkausliiga. The bottom two teams were relegated to Kakkonen.
Die Ykkönen 2013 war die 20. Spielzeit der zweithöchsten finnischen Fußballliga unter diesem Namen und die insgesamt 76. Spielzeit seit der offiziellen Einführung einer solchen im Jahr 1936. Sie begann am 29. April und endete am 5. Oktober 2013. (de)
The 2013 Ykkönen season began on 29 April 2013 and ended on 5 October 2013. The winning team was directly promoted to the 2014 Veikkausliiga. The bottom two teams were relegated to Kakkonen. (en)
La Ykkönen 2013 fu la diciannovesima edizione della seconda serie del campionato finlandese di calcio come Ykkönen. Il campionato, con il formato a girone unico e composto da dieci squadre, venne vinto dall'SJK, che venne promosso in Veikkausliiga. (it)