League Record as Barnet
| Season | Position Finished | Played | Won | Drawn | Lost | For | Against | Points | League & Division |
| 1898/99 | 3rd | 16 | 6 | 5 | 5 | 33 | 30 | 17 | London League Division 1 |
| 1899/00 | 9th | 18 | 4 | 2 | 12 | 33 | 52 | 10 | London League Division 1 |
| 1900/01 | n/a | 13 | 0 | 1 | 12 | 5 | 55 | 1 | London League Division 1 |
| Barnet resigned from the London League and their playing record was expunged | |||||||||
League Record as Barnet & Alston
| Season | Position Finished | Played | Won | Drawn | Lost | For | Against | Points | League & Division |
| 1912/13 | 2nd | 16 | 9 | 3 | 4 | 36 | 17 | 21 | Athenian League |
| 1913/14 | 6th | 22 | 9 | 4 | 9 | 32 | 28 | 22 | Athenian League |
| World War 1 Suspended Play | |||||||||
League Record as Barnet
| Season | Position Finished | Played | Won | Drawn | Lost | For | Against | Points | League & Division |
| 1919/20 | 3rd | 22 | 11 | 4 | 7 | 53 | 31 | 26 | Athenian League |
| 1920/21 | 6th | 22 | 11 | 2 | 9 | 49 | 35 | 24 | Athenian League |
| 1921/22 | 12th | 26 | 6 | 8 | 12 | 29 | 45 | 20 | Athenian League |
| 1922/23 | 6th | 24 | 11 | 5 | 8 | 43 | 40 | 27 | Athenian League |
| 1923/24 | 4th | 24 | 11 | 6 | 7 | 48 | 29 | 28 | Athenian League |
| 1924/25 | 6th | 26 | 10 | 7 | 9 | 35 | 38 | 27 | Athenian League |
| 1925/26 | 6th | 26 | 12 | 4 | 10 | 74 | 57 | 28 | Athenian League |
| 1926/27 | 7th | 26 | 10 | 6 | 10 | 48 | 40 | 26 | Athenian League |
| 1927/28 | 8th | 26 | 11 | 5 | 10 | 68 | 63 | 27 | Athenian League |
| 1928/29 | 7th | 26 | 12 | 3 | 11 | 67 | 55 | 27 | Athenian League |
| 1929/30 | 2nd | 26 | 17 | 3 | 6 | 75 | 35 | 37 | Athenian League |
| 1930/31 | 1st | 26 | 22 | 2 | 2 | 103 | 30 | 46 | Athenian League |
| 1931/32 | 1st | 26 | 17 | 5 | 4 | 90 | 56 | 39 | Athenian League |
| 1932/33 | 3rd | 26 | 15 | 4 | 7 | 74 | 48 | 34 | Athenian League |
| 1933/34 | 5th | 26 | 13 | 2 | 11 | 66 | 55 | 28 | Athenian League |
| 1934/35 | 10th | 26 | 9 | 3 | 14 | 41 | 53 | 21 | Athenian League |
| 1935/36 | 12th | 26 | 6 | 3 | 17 | 53 | 83 | 15 | Athenian League |
| 1936/37 | 6th | 26 | 11 | 3 | 12 | 66 | 82 | 25 | Athenian League |
| 1937/38 | 2nd | 26 | 15 | 3 | 8 | 62 | 46 | 33 | Athenian League |
| 1938/39 | 5th | 26 | 10 | 5 | 11 | 62 | 68 | 25 | Athenian League |
| World War 2 Suspended Play | |||||||||
| 1945/46 | 8th | 26 | 10 | 5 | 11 | 73 | 70 | 25 | Athenian League |
| 1946/47 | 1st | 26 | 15 | 4 | 7 | 88 | 45 | 34 | Athenian League |
| 1947/48 | 1st | 26 | 18 | 2 | 6 | 86 | 38 | 38 | Athenian League |
| 1948/49 | 9th | 26 | 10 | 3 | 13 | 46 | 53 | 23 | Athenian League |
| 1949/50 | 8th | 26 | 10 | 2 | 14 | 53 | 56 | 22 | Athenian League |
| 1950/51 | 8th | 30 | 13 | 3 | 14 | 82 | 69 | 29 | Athenian League |
| 1951/52 | 12th | 30 | 7 | 8 | 15 | 53 | 72 | 22 | Athenian League |
| 1952/53 | 9th | 26 | 10 | 3 | 13 | 39 | 46 | 23 | Athenian League |
| 1953/54 | 13th | 26 | 8 | 4 | 14 | 36 | 54 | 20 | Athenian League |
| 1954/55 | 11th | 26 | 6 | 11 | 9 | 39 | 48 | 23 | Athenian League |
| 1955/56 | 7th | 28 | 11 | 6 | 11 | 53 | 58 | 28 | Athenian League |
| 1956/57 | 15th | 28 | 4 | 7 | 17 | 41 | 79 | 15 | Athenian League |
| 1957/58 | 4th | 30 | 16 | 5 | 9 | 78 | 52 | 37 | Athenian League |
| 1958/59 | 1st | 30 | 20 | 4 | 6 | 85 | 44 | 44 | Athenian League |
| 1959/60 | 2nd | 30 | 17 | 9 | 4 | 79 | 35 | 43 | Athenian League |
| 1960/61 | 3rd | 30 | 17 | 5 | 8 | 69 | 43 | 39 | Athenian League |
| 1961/62 | 2nd | 30 | 23 | 3 | 4 | 85 | 30 | 49 | Athenian League |
| 1962/63 | 2nd | 30 | 22 | 3 | 5 | 90 | 39 | 47 | Athenian League |
| 1963/64 | 1st | 26 | 17 | 4 | 5 | 82 | 34 | 38 | Athenian League Premier Division |
| 1964/65 | ▲1st | 30 | 23 | 4 | 3 | 107 | 29 | 50 | Athenian League Premier Division |
| 1965/66 | ▲1st | 46 | 30 | 9 | 7 | 114 | 49 | 69 | Southern League Division 1 |
| 1966/67 | 5th | 42 | 18 | 13 | 11 | 86 | 66 | 49 | Southern League Premier Division |
| 1967/68 | 7th | 42 | 20 | 8 | 14 | 81 | 71 | 48 | Southern League Premier Division |
| 1968/69 | 12th | 42 | 15 | 10 | 17 | 72 | 66 | 40 | Southern League Premier Division |
| 1969/70 | 7th | 42 | 16 | 15 | 11 | 71 | 54 | 47 | Southern League Premier Division |
| 1970/71 | 6th | 42 | 18 | 14 | 10 | 69 | 49 | 50 | Southern League Premier Division |
| 1971/72 | 4th | 42 | 21 | 7 | 14 | 80 | 57 | 49 | Southern League Premier Division |
| 1972/73 | 13th | 42 | 15 | 11 | 16 | 60 | 59 | 41 | Southern League Premier Division |
| 1973/74 | 8th | 42 | 18 | 9 | 15 | 55 | 46 | 45 | Southern League Premier Division |
| 1974/75 | ▼21st | 42 | 10 | 9 | 23 | 44 | 76 | 29 | Southern League Premier Division |
| 1975/76 | 9th | 42 | 15 | 12 | 15 | 56 | 57 | 42 | Southern League Division 1 North |
| 1976/77 | ▲1st | 34 | 23 | 8 | 3 | 65 | 25 | 54 | Southern League Division 1 South |
| 1977/78 | 7th | 42 | 18 | 11 | 13 | 63 | 58 | 47 | Southern League Premier Division |
| 1978/79 | 13th | 42 | 16 | 10 | 16 | 52 | 64 | 42 | Southern League Premier Division |
| ▲Barnet left the Southern League and joined the newly formed Alliance Premier League | |||||||||
| 1979/80 | 17th | 38 | 10 | 10 | 18 | 32 | 48 | 30 | Alliance Premier League |
| 1980/81 | 17th | 38 | 12 | 7 | 19 | 39 | 64 | 31 | Alliance Premier League |
| 1981/82 | 18th | 42 | 9 | 14 | 19 | 36 | 52 | 41 | Alliance Premier League |
| 1982/83 | 15th | 42 | 16 | 3 | 23 | 55 | 78 | 51 | Alliance Premier League |
| 1983/84 | 9th | 42 | 16 | 10 | 16 | 55 | 58 | 49 | Alliance Premier League |
| 1984/85 | 15th | 42 | 15 | 11 | 16 | 59 | 52 | 47 | Alliance Premier League |
| 1985/86 | 14th | 42 | 13 | 11 | 18 | 56 | 60 | 41 | Alliance Premier League |
| The Alliance Premier League was renamed to the Football Conference | |||||||||
| 1986/87 | 2nd | 42 | 25 | 10 | 7 | 86 | 39 | 85 | Football Conference |
| 1987/88 | 2nd | 42 | 23 | 11 | 8 | 93 | 45 | 80 | Football Conference |
| 1988/89 | 8th | 40 | 18 | 7 | 15 | 64 | 69 | 61 | Football Conference |
| 1989/90 | 2nd | 42 | 26 | 7 | 9 | 81 | 41 | 85 | Football Conference |
| 1990/91 | ▲1st | 42 | 26 | 9 | 7 | 103 | 52 | 87 | Football Conference |
| 1991/92 | ♦►7th | 42 | 21 | 6 | 15 | 81 | 61 | 69 | Football League Fourth Division |
| Following the formation of the Premier League, the Fourth Division was renamed to Division 3 | |||||||||
| 1992/93 | ▲3rd | 42 | 23 | 10 | 9 | 66 | 48 | 79 | Football League Division 3 |
| 1993/94 | ▼24th | 46 | 5 | 13 | 28 | 41 | 86 | 28 | Football League Division 2 |
| 1994/95 | 11th | 42 | 15 | 11 | 16 | 56 | 63 | 56 | Football League Division 3 |
| 1995/96 | 9th | 46 | 18 | 16 | 12 | 65 | 45 | 70 | Football League Division 3 |
| 1996/97 | 15th | 46 | 14 | 16 | 16 | 46 | 51 | 58 | Football League Division 3 |
| 1997/98 | ♦►7th | 46 | 19 | 13 | 14 | 61 | 51 | 70 | Football League Division 3 |
| 1998/99 | 16th | 46 | 14 | 13 | 19 | 54 | 71 | 55 | Football League Division 3 |
| 1999/00 | ♦►6th | 46 | 21 | 12 | 13 | 59 | 53 | 75 | Football League Division 3 |
| 2000/01 | ▼24th | 46 | 12 | 9 | 25 | 67 | 81 | 45 | Football League Division 3 |
| 2001/02 | 5th | 42 | 19 | 10 | 13 | 64 | 48 | 67 | Football Conference |
| 2002/03 | 11th | 42 | 13 | 14 | 15 | 65 | 68 | 53 | Football Conference |
| 2003/04 | ♦►4th | 42 | 19 | 14 | 9 | 60 | 46 | 71 | Football Conference |
| 2004/05 | ▲1st | 42 | 26 | 8 | 8 | 90 | 44 | 86 | Football Conference National |
| 2005/06 | 18th | 46 | 12 | 18 | 16 | 44 | 57 | 54 | Football League Two |
| 2006/07 | 14th | 46 | 16 | 11 | 19 | 55 | 70 | 59 | Football League Two |
| 2007/08 | 12th | 46 | 16 | 12 | 18 | 56 | 63 | 60 | Football League Two |
| 2008/09 | 17th | 46 | 11 | 15 | 20 | 56 | 74 | 48 | Football League Two |
| 2009/10 | 21st | 46 | 12 | 12 | 22 | 47 | 63 | 48 | Football League Two |
| 2010/11 | 22nd | 46 | 12 | 12 | 22 | 58 | 77 | 48 | Football League Two |
| 2011/12 | 22nd | 46 | 12 | 10 | 24 | 52 | 79 | 46 | Football League Two |
| 2012/13 | ▼23rd | 46 | 13 | 12 | 21 | 47 | 59 | 51 | Football League Two |
| 2013/14 | 8th | 46 | 19 | 13 | 14 | 58 | 53 | 70 | Football Conference Premier |
| 2014/15 | ▲1st | 46 | 28 | 8 | 10 | 94 | 46 | 92 | Football Conference Premier |
| 2015/16 | 15th | 46 | 17 | 11 | 18 | 67 | 68 | 62 | Football League Two |
| 2016/17 | 15th | 46 | 14 | 15 | 17 | 57 | 64 | 57 | English Football League Two |
| 2017/18 | ▼23rd | 46 | 12 | 10 | 24 | 46 | 65 | 46 | English Football League Two |
| 2018/19 | 12th | 46 | 16 | 12 | 18 | 45 | 50 | 60 | National League |
| 2019/20 | ♦►7th | 35 | 14 | 12 | 9 | 52 | 42 | 54 | National League |
| 2020/21 | 22nd | 42 | 8 | 7 | 27 | 37 | 88 | 31 | National League |
| 2021/22 | 18th | 44 | 13 | 11 | 20 | 59 | 89 | 50 | National League |
| 2022/23 | ♦►5th | 46 | 21 | 11 | 14 | 75 | 67 | 74 | National League |
| 2023/24 | ♦►2nd | 46 | 26 | 8 | 12 | 91 | 60 | 86 | National League |
| 2024/25 | ▲1st | 46 | 31 | 9 | 6 | 97 | 38 | 102 | National League |
| 2025/26 | - | - | - | - | - | - | - | - | English Football League Two |