League Record
| Season | Position Finished | Played | Won | Drawn | Lost | For | Against | Points | League & Division |
| 1921/22 | 8th | 26 | 11 | 3 | 12 | 57 | 56 | 25 | Athenian League |
| 1922/23 | 7th | 24 | 10 | 6 | 8 | 46 | 39 | 26 | Athenian League |
| 1923/24 | 10th | 24 | 9 | 3 | 12 | 32 | 48 | 21 | Athenian League |
| 1924/25 | 13th | 26 | 5 | 8 | 13 | 37 | 64 | 18 | Athenian League |
| 1925/26 | 14th | 26 | 3 | 2 | 21 | 37 | 116 | 8 | Athenian League |
| 1926/27 | 11th | 26 | 10 | 4 | 12 | 54 | 65 | 24 | Athenian League |
| 1927/28 | 1st | 26 | 20 | 3 | 3 | 83 | 35 | 43 | Athenian League |
| 1928/29 | 3rd | 26 | 13 | 7 | 6 | 73 | 50 | 33 | Athenian League |
| 1929/30 | 8th | 26 | 9 | 6 | 11 | 49 | 51 | 24 | Athenian League |
| 1930/31 | 11th | 26 | 9 | 4 | 13 | 45 | 57 | 22 | Athenian League |
| 1931/32 | 9th | 26 | 9 | 7 | 10 | 65 | 56 | 25 | Athenian League |
| 1932/33 | 6th | 26 | 10 | 5 | 11 | 54 | 66 | 25 | Athenian League |
| 1933/34 | 6th | 26 | 12 | 2 | 12 | 58 | 56 | 26 | Athenian League |
| 1934/35 | 9th | 26 | 10 | 3 | 13 | 69 | 63 | 23 | Athenian League |
| 1935/36 | 10th | 26 | 9 | 5 | 12 | 40 | 61 | 23 | Athenian League |
| 1936/37 | 4th | 26 | 11 | 5 | 10 | 47 | 45 | 27 | Athenian League |
| 1937/38 | 6th | 26 | 10 | 6 | 10 | 56 | 63 | 26 | Athenian League |
| 1938/39 | 10th | 26 | 9 | 4 | 13 | 45 | 57 | 22 | Athenian League |
| World War 2 Suspended Play | |||||||||
| 1945/46 | 1st | 26 | 17 | 6 | 3 | 100 | 44 | 40 | Athenian League |
| 1946/47 | 2nd | 26 | 15 | 4 | 7 | 59 | 37 | 34 | Athenian League |
| 1947/48 | 8th | 26 | 9 | 7 | 10 | 32 | 38 | 25 | Athenian League |
| 1948/49 | 5th | 26 | 9 | 8 | 9 | 32 | 33 | 26 | Athenian League |
| 1949/50 | 12th | 26 | 9 | 2 | 15 | 37 | 48 | 20 | Athenian League |
| 1950/51 | 5th | 30 | 15 | 5 | 10 | 63 | 51 | 35 | Athenian League |
| 1951/52 | 4th | 30 | 15 | 8 | 7 | 70 | 53 | 38 | Athenian League |
| 1952/53 | 13th | 26 | 7 | 4 | 15 | 44 | 60 | 18 | Athenian League |
| 1953/54 | 8th | 26 | 8 | 7 | 11 | 35 | 42 | 23 | Athenian League |
| 1954/55 | 4th | 26 | 11 | 8 | 7 | 57 | 45 | 30 | Athenian League |
| 1955/56 | 12th | 28 | 9 | 4 | 15 | 56 | 64 | 22 | Athenian League |
| 1956/57 | 11th | 28 | 10 | 5 | 13 | 40 | 51 | 25 | Athenian League |
| 1957/58 | 1st | 30 | 18 | 7 | 5 | 64 | 37 | 43 | Athenian League |
| 1958/59 | 10th | 30 | 10 | 6 | 14 | 49 | 60 | 26 | Athenian League |
| 1959/60 | 6th | 30 | 16 | 1 | 13 | 66 | 60 | 33 | Athenian League |
| 1960/61 | 4th | 30 | 17 | 3 | 10 | 71 | 55 | 37 | Athenian League |
| 1961/62 | 9th | 30 | 13 | 2 | 15 | 70 | 69 | 28 | Athenian League |
| 1962/63 | 4th | 30 | 16 | 4 | 10 | 75 | 47 | 36 | Athenian League |
| Sutton United left the Athenian League and joined the Isthmian League | |||||||||
| 1963/64 | 4th | 38 | 23 | 5 | 10 | 99 | 64 | 51 | Isthmian League |
| 1964/65 | 7th | 38 | 17 | 11 | 10 | 74 | 57 | 45 | Isthmian League |
| 1965/66 | 9th | 38 | 17 | 7 | 14 | 83 | 72 | 41 | Isthmian League |
| 1966/67 | 1st | 38 | 26 | 7 | 5 | 89 | 33 | 59 | Isthmian League |
| 1967/68 | 2nd | 38 | 22 | 11 | 5 | 89 | 27 | 55 | Isthmian League |
| 1968/69 | 3rd | 38 | 22 | 9 | 7 | 83 | 29 | 53 | Isthmian League |
| 1969/70 | 3rd | 38 | 24 | 9 | 5 | 75 | 35 | 57 | Isthmian League |
| 1970/71 | 2nd | 38 | 29 | 3 | 6 | 76 | 35 | 61 | Isthmian League |
| 1971/72 | 6th | 40 | 21 | 10 | 9 | 77 | 43 | 52 | Isthmian League |
| 1972/73 | 7th | 42 | 21 | 9 | 12 | 69 | 48 | 51 | Isthmian League |
| 1973/74 | 12th | 42 | 13 | 16 | 13 | 51 | 52 | 55 | Isthmian League Division 1 |
| 1974/75 | 10th | 42 | 17 | 6 | 19 | 68 | 63 | 57 | Isthmian League Division 1 |
| 1975/76 | 11th | 42 | 17 | 11 | 14 | 71 | 60 | 62 | Isthmian League Division 1 |
| 1976/77 | 16th | 42 | 14 | 7 | 21 | 40 | 55 | 49 | Isthmian League Division 1 |
| The Isthmian League renamed its Divisions, Division 1 became the Premier Division | |||||||||
| 1977/78 | 6th | 42 | 18 | 12 | 12 | 66 | 57 | 66 | Isthmian League Premier Division |
| 1978/79 | 11th | 42 | 17 | 9 | 16 | 62 | 51 | 60 | Isthmian League Premier Division |
| 1979/80 | 4th | 42 | 20 | 13 | 9 | 67 | 40 | 73 | Isthmian League Premier Division |
| 1980/81 | 5th | 42 | 19 | 12 | 11 | 82 | 65 | 69 | Isthmian League Premier Division |
| 1981/82 | 2nd | 42 | 22 | 9 | 11 | 72 | 49 | 75 | Isthmian League Premier Division |
| 1982/83 | 5th | 42 | 20 | 8 | 14 | 96 | 71 | 68 | Isthmian League Premier Division |
| 1983/84 | 4th | 42 | 18 | 12 | 12 | 67 | 45 | 66 | Isthmian League Premier Division |
| 1984/85 | 1st | 42 | 23 | 15 | 4 | 115 | 55 | 84 | Isthmian League Premier Division |
| 1985/86 | ▲1st | 42 | 29 | 8 | 5 | 109 | 39 | 95 | Isthmian League Premier Division |
| 1986/87 | 7th | 42 | 19 | 11 | 12 | 81 | 51 | 68 | Football Conference |
| 1987/88 | 8th | 42 | 16 | 18 | 8 | 77 | 54 | 66 | Football Conference |
| 1988/89 | 12th | 40 | 12 | 15 | 13 | 64 | 54 | 51 | Football Conference |
| 1989/90 | 8th | 42 | 19 | 6 | 17 | 68 | 64 | 63 | Football Conference |
| 1990/91 | ▼21st | 42 | 10 | 9 | 23 | 62 | 82 | 39 | Football Conference |
| 1991/92 | 3rd | 42 | 19 | 13 | 10 | 88 | 51 | 70 | Isthmian League Premier Division |
| 1992/93 | 5th | 42 | 18 | 14 | 10 | 74 | 57 | 68 | Isthmian League Premier Division |
| 1993/94 | 5th | 42 | 23 | 10 | 9 | 77 | 31 | 79 | Isthmian League Premier Division |
| 1994/95 | 15th | 42 | 13 | 12 | 17 | 74 | 69 | 51 | Isthmian League Premier Division |
| 1995/96 | 10th | 42 | 17 | 14 | 11 | 71 | 56 | 65 | Isthmian League Premier Division |
| 1996/97 | 3rd | 42 | 18 | 13 | 11 | 87 | 70 | 67 | Isthmian League Premier Division |
| 1997/98 | 3rd | 42 | 22 | 12 | 8 | 83 | 56 | 78 | Isthmian League Premier Division |
| 1998/99 | ▲1st | 42 | 27 | 7 | 8 | 89 | 39 | 88 | Isthmian League Premier Division |
| 1999/00 | ▼22nd | 42 | 8 | 10 | 24 | 39 | 75 | 34 | Football Conference |
| 2000/01 | 13th | 41 | 14 | 11 | 16 | 74 | 70 | 53 | Isthmian League Premier Division |
| 2001/02 | 12th | 42 | 13 | 15 | 14 | 62 | 63 | 54 | Isthmian League Premier Division |
| 2002/03 | 6th | 46 | 22 | 9 | 15 | 77 | 62 | 75 | Isthmian League Premier Division |
| 2003/04 | ▲2nd | 46 | 25 | 10 | 11 | 94 | 56 | 85 | Isthmian League Premier Division |
| ▲Due to the formation of the Football Conference North & South, Sutton United were Promoted to the South Division | |||||||||
| 2004/05 | 15th | 42 | 14 | 11 | 17 | 60 | 71 | 53 | Football Conference South |
| 2005/06 | 13th | 42 | 13 | 10 | 19 | 48 | 61 | 49 | Football Conference South |
| 2006/07 | 14th | 42 | 14 | 9 | 19 | 58 | 63 | 51 | Football Conference South |
| 2007/08 | ▼22nd | 42 | 5 | 9 | 28 | 32 | 86 | 24 | Football Conference South |
| 2008/09 | ♦►5th | 42 | 18 | 13 | 11 | 57 | 53 | 67 | Isthmian League Premier Division |
| 2009/10 | ♦►2nd | 42 | 22 | 9 | 11 | 65 | 45 | 75 | Isthmian League Premier Division |
| 2010/11 | ♦1st | 42 | 26 | 9 | 7 | 76 | 33 | 87 | Isthmian League Premier Division |
| 2011/12 | ♦►4th | 42 | 20 | 14 | 8 | 68 | 53 | 74 | Football Conference South |
| 2012/13 | 6th | 42 | 20 | 10 | 12 | 66 | 49 | 70 | Football Conference South |
| 2013/14 | ♦►2nd | 42 | 23 | 12 | 7 | 77 | 39 | 81 | Football Conference South |
| 2014/15 | 15th | 40 | 13 | 11 | 16 | 50 | 54 | 50 | Football Conference South |
| The Football Conference was renamed and became the National League | |||||||||
| 2015/16 | ▲1st | 42 | 26 | 12 | 4 | 83 | 32 | 90 | National League South |
| 2016/17 | 12th | 46 | 15 | 13 | 18 | 61 | 63 | 58 | National League |
| 2017/18 | ♦►3rd | 46 | 23 | 10 | 13 | 67 | 53 | 79 | National League |
| 2018/19 | 9th | 46 | 17 | 14 | 15 | 55 | 60 | 65 | National League |
| 2019/20 | 15th | 38 | 12 | 14 | 12 | 47 | 42 | 50 | National League |
| 2020/21 | ▲1st | 42 | 25 | 9 | 8 | 72 | 36 | 84 | National League |
| 2021/22 | 8th | 46 | 22 | 10 | 14 | 69 | 53 | 76 | English Football League Two |
| 2022/23 | 14th | 46 | 15 | 13 | 18 | 46 | 58 | 58 | English Football League Two |
| 2023/24 | ▼23rd | 46 | 9 | 15 | 22 | 59 | 84 | 42 | English Football League Two |
| 2024/25 | 12th | 46 | 15 | 15 | 16 | 59 | 64 | 60 | National League |
| 2025/26 | - | - | - | - | - | - | - | - | National League |