The 2021 Czech Championships were held from June 25 through June 27 in Brno, Czech Republic.
Senior All-Around Results
| Rank | Athlete | FX | PH | SR | VT | PB | HB | AA |
| 1 | David Jessen Sokol Brno |
13.750 | 12.400 | 13.450 | 14.350 | 13.600 | 14.350 | 81.900 |
| 2 | Daniel Radovesnicky Sokol Kolin |
13.400 | 13.000 | 13.000 | 13.250 | 13.300 | 13.250 | 79.200 |
| 3 | Frantisek Cerny Sokol Brno |
13.800 | 11.700 | 12.850 | 14.050 | 13.200 | 13.400 | 79.000 |
| 4 | Daniel Ponizil Prostejov |
13.550 | 11.600 | 13.150 | 14.000 | 13.300 | 12.600 | 78.200 |
| 5 | Ondrej Kalny Hradcany |
14.000 | 12.350 | —— | 14.400 | 12.150 | 12.600 | 65.500 |
| 6 | Milan Krejci Sokol Brno |
10.400 | 10.800 | 10.750 | 10.800 | 10.950 | 11.100 | 64.800 |
| 7 | Stepan Vogl Sokol Kolin |
9.900 | 10.250 | 10.750 | 10.400 | 10.650 | 10.800 | 62.750 |
| 8 | Mario Mihal Sokol Podebrady |
11.050 | 7.450 | 10.400 | 11.050 | 9.950 | 8.900 | 58.800 |
| 9 | Lukas Bajer Sokol Zlin |
9.650 | 6.350 | 7.800 | 12.300 | 11.300 | 10.350 | 57.750 |
| 10 | Stepan Pulda Sokol Podebrady |
4.700 | 6.350 | 9.150 | 10.350 | 9.900 | 9.000 | 49.450 |
| 11 | Radomir Sliz Trinec |
—— | 12.700 | —— | —— | 9.200 | 11.700 | 33.600 |
| 12 | Matvei Petrov Hradcany |
—— | 14.650 | —— | —— | —— | —— | 14.650 |
| 13 | Jonas Behal Sokol Brno |
—— | —— | —— | —— | —— | 12.600 | 12.600 |
| 14 | Svjatoslav Solovjev Hradcany |
—— | 11.000 | —— | —— | —— | —— | 11.000 |
Senior Floor Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Ondrej Kalny | Hradcany | 5.8 | 8.700 | 14.500 | |
| 2 | Daniel Ponizil | Prostejov | 5.6 | 8.650 | 14.250 | |
| 3 | Frantisek Cerny | Sokol Brno | 5.9 | 8.000 | 13.900 | |
| 4 | David Jessen | Sokol Brno | 4.2 | 8.250 | 12.450 | |
| 5 | Lukas Bajer | Sokol Zlin | 4.4 | 6.350 | 10.750 | |
| 6 | Stepan Vogl | Sokol Kolin | 3.4 | 7.350 | -0.3 | 10.450 |
Senior Pommels Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Matvei Petrov | Hradcany | 6.2 | 9.400 | 15.600 | |
| 2 | David Jessen | Sokol Brno | 5.3 | 8.750 | 14.050 | |
| 3 | Daniel Radovesnicky | Sokol Kolin | 4.6 | 8.400 | 13.000 | |
| 4 | Radomir Sliz | Trinec | 5.7 | 7.100 | 12.800 | |
| 5 | Ondrej Kalny | Hradcany | 4.7 | 7.750 | 12.450 | |
| 6 | Frantisek Cerny | Sokol Brno | 2.9 | 7.550 | 10.450 |
Senior Rings Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Daniel Ponizil | Prostejov | 4.0 | 9.300 | 13.300 | |
| 2 | Frantisek Cerny | Sokol Brno | 4.1 | 7.800 | 11.900 | |
| 3 | Daniel Radovsenicky | Sokol Kolin | 4.0 | 7.600 | 11.600 | |
| 4 | Stepan Vogl | Sokol Kolin | 3.0 | 8.200 | -0.3 | 10.900 |
| 5 | Milan Krejci | Sokol Brno | 2.6 | 8.500 | -0.3 | 10.800 |
| 6 | Lukas Bajer | Sokol Zlin | 3.2 | 6.850 | -0.3 | 9.750 |
Senior Vault Final Results
| Rank | Athlete | Club | D | E | ND | Total | Average |
| 1 | Ondrej Kalny | Hradcany | 5.2 | 9.350 | 14.550 | 14.325 | |
| 4.8 | 9.400 | -0.1 | 14.100 | ||||
| 2 | Daniel Ponizil | Prostejov | 4.8 | 9.450 | 14.250 | 13.750 | |
| 4.0 | 9.250 | 13.250 | |||||
| 3 | Lukas Bajer | Sokol Zlin | 3.2 | 9.050 | 12.250 | 11.825 | |
| 2.4 | 9.000 | 11.400 | |||||
| 4 | Frantisek Cerny | Sokol Brno | 5.2 | 8.350 | -0.3 | 13.250 | 6.625 |
| 0.0 | 0.000 | 0.000 |
Senior P-Bars Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | David Jessen | Sokol Brno | 5.2 | 9.000 | 14.200 | |
| 2 | Daniel Radovesnicky | Sokol Kolin | 5.0 | 8.900 | 13.900 | |
| 3 | Frantisek Cerny | Sokol Brno | 4.9 | 8.850 | 13.750 | |
| 4 | Daniel Ponizil | Prostejov | 4.9 | 6.850 | 11.750 | |
| 5 | Ondrej Kalny | Hradcany | 4.0 | 7.500 | 11.500 | |
| 6 | Lukas Bajer | Sokol Zlin | 3.3 | 7.300 | 10.600 |
Senior High Bar Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | David Jessen | Sokol Brno | 5.2 | 9.150 | 14.350 | |
| 2 | Daniel Radovesnicky | Sokol Kolin | 4.9 | 8.450 | 13.350 | |
| 3 | Frantisek Cerny | Sokol Brno | 5.0 | 8.350 | 13.350 | |
| 4 | Jonas Behal | Sokol Brno | 5.0 | 8.300 | 13.300 | |
| 5 | Ondrej Kalny | Hradcany | 3.8 | 8.850 | 12.650 | |
| 6 | Daniel Ponizil | Prostejov | 3.1 | 7.300 | 10.400 |
Junior All-Around Results
| Rank | Athlete | FX | PH | SR | VT | PB | HB | AA |
| 1 | Daniel Bago Sokol Brno |
13.000 | 11.850 | 13.250 | 14.050 | 11.450 | 12.800 | 76.400 |
| 2 | Miroslav Durak Sokol Brno |
12.650 | 11.900 | 12.850 | 12.800 | 12.400 | 12.650 | 75.250 |
| 3 | Martin Pospisil Sokol Brno |
12.600 | 10.950 | 12.100 | 12.600 | 12.050 | 11.150 | 71.450 |
| 4 | Dan Nemecek Sokol Brno |
12.300 | 12.150 | 10.700 | 11.850 | 11.850 | 11.750 | 70.600 |
| 5 | Sebastian Adamus Sokol Brno |
12.200 | 9.950 | 11.700 | 13.000 | 10.900 | 11.800 | 69.550 |
| 6 | Joseph Smith Sokol Brno |
11.850 | 9.500 | 11.750 | 12.050 | 11.550 | 10.800 | 67.500 |
| 7 | Milan Neshyba Sokol Brno |
11.100 | 10.250 | 10.800 | 12.750 | 11.400 | 10.850 | 67.150 |
| 8 | Jiri Tomasek Hradcany |
10.800 | 10.150 | 10.100 | 12.100 | 10.350 | 10.750 | 64.250 |
| 9 | Jan Vachutka Sokol Kolin |
11.450 | 9.100 | 10.900 | 12.650 | 8.700 | 10.550 | 63.350 |
| 10 | Antonin Vasak Sokol Brno |
11.550 | 7.800 | 11.350 | 10.650 | 10.950 | 10.700 | 63.000 |
| 11 | Adam Uherka Sokol Brno |
12.000 | 9.350 | 8.600 | 11.000 | 10.300 | 10.200 | 61.450 |
| 12 | Michal Kopecky Sokol Zlin |
12.550 | 8.800 | 8.800 | 11.550 | 10.150 | 8.700 | 60.550 |
| 13 | Jakub Zapletal UP Olomouc |
10.400 | 8.750 | 8.850 | 11.150 | 10.350 | 9.800 | 59.300 |
| 14 | Ondrej Pluhar Sokol Zlin |
9.950 | 9.250 | 9.800 | 12.000 | 11.100 | 4.450 | 56.550 |
| 15 | David Jaksa Doksy |
9.950 | 9.950 | 6.100 | 10.600 | 4.350 | 8.550 | 49.500 |
| 16 | Matej Marsalek Sokol Zlin |
—— | 8.700 | 9.250 | 10.750 | 11.000 | 9.400 | 49.100 |
| 17 | Frantisek Marghold Sokol Kolin |
—— | 11.000 | 12.700 | —— | 12.450 | 10.800 | 46.950 |
| 18 | Jachym Turon Trinec |
6.550 | —— | 9.300 | 12.200 | 10.950 | —— | 39.000 |
| 19 | Jack Gagamov Sokol Brno |
—— | —— | 11.300 | 12.900 | 9.250 | —— | 33.450 |
Junior Floor Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Daniel Bago | Sokol Brno | 4.3 | 9.000 | 13.300 | |
| 2 | Miroslav Durak | Sokol Brno | 3.9 | 9.100 | -0.1 | 12.900 |
| 3 | Dan Nemecek | Sokol Brno | 4.0 | 8.800 | 12.800 | |
| 4 | Sebastian Adamus | Sokol Brno | 4.2 | 8.500 | 12.700 | |
| 5 | Martin Pospisil | Sokol Brno | 3.8 | 8.300 | 12.100 | |
| 6 | Michal Kopecky | Sokol Zlin | 4.3 | 7.700 | 12.000 |
Junior Pommels Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Daniel Bago | Sokol Brno | 3.9 | 8.300 | 12.200 | |
| 2 | Dan Nemecek | Sokol Brno | 4.1 | 8.100 | 12.200 | |
| 3 | Miroslav Durak | Sokol Brno | 3.9 | 6.950 | 10.850 | |
| 4 | Jiri Tomasek | Hradcany | 3.0 | 7.600 | 10.600 | |
| 5 | Martin Pospisil | Sokol Brno | 2.8 | 8.050 | -0.3 | 10.550 |
| 6 | Frantisek Marghold | Sokol Kolin | 2.6 | 4.950 | 7.550 |
Junior Rings Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Frantisek Marghold | Sokol Kolin | 3.9 | 9.050 | 12.950 | |
| 2 | Miroslav Durak | Sokol Brno | 4.1 | 8.600 | 12.700 | |
| 3 | Daniel Bago | Sokol Brno | 3.7 | 8.700 | -0.3 | 12.100 |
| 4 | Martin Pospisil | Sokol Brno | 3.9 | 7.550 | 11.450 | |
| 5 | Joseph Smith | Sokol Brno | 3.7 | 7.800 | -0.3 | 11.200 |
| 6 | Sebastian Adamus | Sokol Brno | 3.0 | 8.150 | -0.3 | 10.850 |
Junior Vault Final Results
| Rank | Athlete | Club | D | E | ND | Total | Average |
| 1 | Daniel Bago | Sokol Brno | 4.8 | 9.150 | 13.950 | 13.725 | |
| 4.0 | 9.500 | 13.500 | |||||
| 2 | Sebastian Adamus | Sokol Brno | 4.0 | 9.200 | 13.200 | 12.275 | |
| 2.8 | 8.550 | 11.350 | |||||
| 3 | Jan Vachutka | Sokol Kolin | 4.0 | 8.800 | 12.800 | 12.150 | |
| 2.4 | 9.100 | 11.500 | |||||
| 4 | Jachym Turon | Trinec | 3.2 | 9.050 | 12.250 | 11.675 | |
| 2.4 | 8.700 | 11.100 | |||||
| 5 | Jiri Tomasek | Hradcany | 3.2 | 8.600 | 11.800 | 11.650 | |
| 2.4 | 9.100 | 11.500 | |||||
| 6 | Ondrej Pluhar | Sokol Zlin | 2.4 | 8.700 | 11.100 | 10.625 | |
| 2.4 | 7.750 | 10.150 |
Junior P-Bars Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Frantisek Marghold | Sokol Kolin | 4.1 | 8.800 | 12.900 | |
| 2 | Daniel Bago | Sokol Brno | 3.7 | 8.850 | 12.550 | |
| 3 | Martin Pospisil | Sokol Brno | 3.6 | 8.650 | 12.250 | |
| 4 | Dan Nemecek | Sokol Brno | 3.1 | 8.950 | 12.050 | |
| 5 | Miroslav Durak | Sokol Brno | 3.9 | 8.100 | 12.000 | |
| 6 | Joseph Smith | Sokol Brno | 3.1 | 8.700 | 11.800 |
Junior High Bar Final Results
| Rank | Athlete | Club | D | E | ND | Total |
| 1 | Daniel Bago | Sokol Brno | 4.0 | 8.550 | 12.550 | |
| 2 | Miroslav Durak | Sokol Brno | 3.5 | 8.950 | 12.450 | |
| 3 | Frantisek Marghold | Sokol Kolin | 3.9 | 8.150 | 12.050 | |
| 4 | Martin Pospisil | Sokol Brno | 2.7 | 9.050 | 11.750 | |
| 5 | Dan Nemecek | Sokol Brno | 2.7 | 8.950 | 11.650 | |
| 6 | Sebastian Adamus | Sokol Brno | 2.8 | 8.800 | 11.600 |