| Competition: | Druga HNL |
| Season: | 2020–21 |
| Dates: | 13 August 2020 – 29 May 2021 |
| Winners: | Hrvatski Dragovoljac |
| Promoted: | Hrvatski Dragovoljac |
| Relegated: | Junak Sinj Međimurje |
| League Topscorer: | Marko Dabro (30) |
| Biggest Home Win: | Osijek II 6–0 Međimurje Cibalia 6–0 Hrvatski Dragovoljac BSK Bijelo Brdo 6–0 Međimurje |
| Biggest Away Win: | Međimurje 1–6 Hajduk Split II |
| Highest Scoring: | Sesvete 5–4 Orijent 1919 |
| Matches: | 306 |
| Total Goals: | 877 |
| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
| Updated: | 29 May 2021 |
The 2020–21 Croatian Second Football League (also known as Druga HNL and 2. HNL) was the 30th season of the Croatian Second Football League, the second-level football competition for men's association football teams in Croatia, since its establishment in 1992. The season started on 13 August 2020 and ended on 29 May 2021.
The league was contested by 18 teams, two more than the previous season, and played in a double round robin format, with each team playing every other team twice over 34 rounds.[1]
On 20 May 2020, Croatian Football Federation announced that the first stage of licensing procedure for 2020–21 season was complete. For the 2020–21 Druga HNL, a total of 17 clubs were issued a second level license. In the second stage of licensing procedure clubs that were not licensed in the first round appealed the decision.[2] On 17 June 2020, Croatian Football Federation announced that the licensing procedure for 2020–21 season was complete.[3]
| Club | Coach | City / Town | Stadium | 2019–20 result | Capacity | |
|---|---|---|---|---|---|---|
| BSK | Denis Krstanović | Bijelo Brdo | Igralište BSK | 14th | 500 | |
| Cibalia | Petar Tomić | Vinkovci | Stadion HNK Cibalia | 16th | 10,000 | |
| Croatia Zmijavci | Krešimir Režić | Zmijavci | ŠRC Marijan Šuto | 2nd | 1,000 | |
| Dinamo Zagreb II | Ivan Prelec | Stadion Hitrec-Kacian | 8th | 5,000 | ||
| Dubrava | Darko Šantek | Zagreb | Stadion NK Kustošija | 12th | 2,550 | |
| Dugopolje | Dugopolje | Stadion Hrvatski vitezovi | 10th | 5,200 | ||
| Hajduk Split II | Split | Stadion Poljud | 6th | 35,000 | ||
| Hrvatski Dragovoljac | Zagreb | 9th | 5,000 | |||
| Inter Zaprešić | Tomislav Ivković | Zaprešić | 10th (in Prva HNL) | 5,228 | ||
| Junak Sinj | Stipe Grčić | Sinj | Gradski stadion | 1st (in Treća HNL South) | 3,096 | |
| Kustošija | Ante Ivanda | Zagreb | Stadion NK Kustošija | 13th | 2,550 | |
| Međimurje | Mario Kovačević | Čakovec | Stadion SRC Mladost | 11th | 6,500 | |
| Opatija | Zoran Bogolin | Opatija | 1st (in Treća HNL West) | 10,600 | ||
| Orijent 1919 | Damir Milinović | Rijeka | 3rd | 3,500 | ||
| Osijek II | Igor Tolić | Osijek | Stadion Gradski vrt | 7th | 18,856 | |
| Rudeš | Mario Carević | Zagreb | Stadion Kranjčevićeva | 5th | 10,850 | |
| Sesvete | Dino Babić | Zagreb | Stadion sv. Josip Radnik | 4th | 1,200 | |
| Solin |  Ivan Bubalo | Solin | Stadion pokraj Jadra | 15th | 4,000 |
| Position | County | Number | Teams | |
|---|---|---|---|---|
| 1 | City of Zagreb | 6 | Dinamo Zagreb II, Dubrava, Hrvatski Dragovoljac, Kustošija, Rudeš and Sesvete | |
| 2 | 5 | Croatia Zmijavci, Dugopolje, Hajduk Split II, Junak Sinj and Solin | ||
| align=center rowspan="2" | 3 | 2 | BSK and Osijek II | |
| 2 | Opatija and Orijent 1919 | |||
| align=center rowspan="3" | 5 | 1 | Međimurje | |
| 1 | Cibalia | |||
| 1 | Inter Zaprešić |
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 | Marko Dabro | BSK Bijelo Brdo | 30 |
| 2 | Mateo Topić | Sesvete | 18 |
| 3 | Fran Brodić | Kustošija | 14 |
| Mateo Monjac | Orijent 1919 | ||
| 5 | Tomislav Mrkonjić | Croatia Zmijavci | 13 |
| Ivan Šarić | Hajduk Split II | ||
| 7 |  Besart Abdurahimi | Rudeš | 12 |
| Vedran Gerc | Orijent 1919 | ||
| 9 | Petar Bačić-Šiško | Junak Sinj | 10 |
| Stjepan Igrec | Međimurje | ||
| Dragan Juranović | Dubrava |