Isac Alexi Sivert Lidberg (born 8 September 1998) is a Swedish professional footballer who plays as a forward for 2.

[2][3] Advancing through the youth teams, Lidberg played his first game for Hammarby's under 21-team against GIF Sundsvall 2014 as a substitute, and scored a 2–1 goal within a minute.

[3] The senior debut came the same year in Allsvenskan, when Lidberg got substituted with Linus Hallenius in a game against Falkenbergs FF on 13 July.

On 8 April 2016 it was announced that Lidberg was going to be on loan to newly promoted Division 1 club Enskede IK for the whole season.

[11] Isac Lidberg made his debut for Åtvidaberg on match day one of the 2017 Superettan against IFK Värnamo on away turf.

[21] On 1 May 2021, Lidberg signed a two-year contract with an option of an additional year with newly promoted Dutch Eredivisie club Go Ahead Eagles.

[26] He scored his debut goal for Utrecht from a penalty kick on 31 October, contributing to a 3–0 lead in their 3–2 triumph against RKC Waalwijk in the KNVB Cup.

[5][34] Hammarby's former sporting director Mats Jingblad added that Lidberg is a modern forward that often make runs behind the defenders.

[2] Lidberg dreams of playing for Bayern Munich one day and his idol footballer is the German striker Mario Gomez.