Kristers Serģis (born January 14, 1974) is a retired Latvian sidecarcross rider and five times World Champion.

After two seasons with limited success and starts, he switched to Normunds Bērziņš as his partner for 1994 and 1995 but continued to have only a small impact on the race circuit.

After a second place in 2003, the team fell to seventh in 2004 due to an injury for Serģis, which put him out of action for three months, and split up after this season, Verbrugge joining Daniël Willemsen instead.

The Serģis / Stupelis partnership returned in 2007 and with good results and one GP win they achieved third place in the overall standing that season.

Despite this, the two Latvians Serģis / Rasmanis remain the most successful outfit in the history of sidecarcross world championship since Willemsen frequently exchanged partners in his six titles.