| # | Tier | Division | G | W | D | L | GF | GA | Pts | +- | ||
| 1950-51 | English Division Three South | 46 | 14 | 12 | 20 | 63 | 76 | 40 | -13 | |||
| 1951-52 | English Division Three South | 46 | 17 | 12 | 17 | 56 | 77 | 46 | -21 | |||
| 1952-53 | English Division Three South | 46 | 12 | 14 | 20 | 59 | 76 | 38 | -17 | |||
| 1953-54 | English Division Three South | 46 | 10 | 10 | 26 | 50 | 78 | 30 | -28 | |||
| 1954-55 | English Division Three South | 46 | 9 | 13 | 24 | 53 | 91 | 31 | -38 | |||
| 1955-56 | English Division Three South | 46 | 18 | 11 | 17 | 76 | 81 | 47 | -5 | |||
| 1956-57 | English Division Three South | 46 | 22 | 14 | 10 | 84 | 56 | 58 | 28 | |||
| 1957-58 | English Division Three South | 46 | 17 | 13 | 16 | 77 | 79 | 47 | -2 | |||
| 1958-59 | English Division Three | 46 | 21 | 10 | 15 | 71 | 67 | 52 | 4 | |||
| 1959-60 | English Division Three | 46 | 18 | 11 | 17 | 83 | 74 | 47 | 9 | |||
| 1960-61 | English Division Three | 46 | 11 | 11 | 24 | 68 | 101 | 33 | -33 | Relegated | ||
| 1961-62 | English Division Four | 44 | 23 | 9 | 12 | 104 | 71 | 55 | 33 | Promoted | ||
| 1962-63 | English Division Three | 46 | 18 | 11 | 17 | 73 | 93 | 47 | -20 | |||
| 1963-64 | English Division Three | 46 | 12 | 19 | 15 | 70 | 68 | 43 | 2 | |||
| 1964-65 | English Division Three | 46 | 10 | 10 | 26 | 50 | 89 | 30 | -39 | Relegated | ||
| 1965-66 | English Division Four | 46 | 23 | 10 | 13 | 70 | 47 | 56 | 23 | Promoted | ||
| 1966-67 | English Division Three | 46 | 17 | 10 | 19 | 76 | 73 | 44 | 3 | |||
| 1967-68 | English Division Three | 46 | 9 | 15 | 22 | 50 | 87 | 33 | -37 | Relegated | ||
| 1968-69 | English Division Four | 46 | 20 | 12 | 14 | 57 | 53 | 52 | 4 | |||
| 1969-70 | English Division Four | 46 | 17 | 14 | 15 | 64 | 63 | 48 | 1 | |||
| 1970-71 | English Division Four | 46 | 21 | 12 | 13 | 70 | 54 | 54 | 16 | |||
| 1971-72 | English Division Four | 46 | 19 | 10 | 17 | 70 | 69 | 48 | 1 | |||
| 1972-73 | English Division Four | 46 | 10 | 11 | 25 | 48 | 76 | 31 | -28 | |||
| 1973-74 | English Division Four | 46 | 24 | 12 | 10 | 73 | 36 | 60 | 37 | Promoted | ||
| 1974-75 | English Division Three | 46 | 17 | 13 | 16 | 70 | 63 | 47 | 7 | |||
| 1975-76 | English Division Three | 46 | 12 | 14 | 20 | 41 | 65 | 38 | -24 | Relegated | ||
| 1976-77 | English Division Four | 46 | 25 | 9 | 12 | 77 | 43 | 59 | 34 | Promoted | ||
| 1977-78 | English Division Three | 46 | 15 | 18 | 13 | 55 | 44 | 48 | 11 | |||
| 1978-79 | English Division Three | 46 | 17 | 17 | 12 | 60 | 55 | 51 | 5 | |||
| 1979-80 | English Division Three | 46 | 20 | 12 | 14 | 64 | 56 | 52 | 8 | |||
| 1980-81 | English Division Three | 46 | 14 | 11 | 21 | 45 | 65 | 39 | -20 | Relegated | ||
| 1981-82 | English Division Four | 46 | 20 | 12 | 14 | 82 | 57 | 72 | 25 | |||
| 1982-83 | English Division Four | 46 | 24 | 9 | 13 | 75 | 55 | 81 | 20 | |||
| 1983-84 | English Division Four | 46 | 17 | 16 | 13 | 69 | 53 | 67 | 16 | |||
| 1984-85 | English Division Four | 46 | 20 | 14 | 12 | 87 | 65 | 74 | 22 | |||
| 1985-86 | English Division Four | 46 | 19 | 13 | 14 | 88 | 63 | 70 | 25 | |||
| 1986-87 | English Division Four | 46 | 21 | 7 | 18 | 64 | 56 | 70 | 8 | |||
| 1987-88 | English Division Four | 46 | 19 | 10 | 17 | 47 | 51 | 67 | -4 | |||
| 1988-89 | English Division Four | 46 | 12 | 14 | 20 | 60 | 78 | 50 | -18 | |||
| 1989-90 | English Division Four | 46 | 11 | 10 | 25 | 48 | 75 | 43 | -27 | Relegated | ||
| 1990-91 | English National League | 42 | 25 | 10 | 7 | 68 | 35 | 85 | 33 | |||
| 1991-92 | English National League | 42 | 28 | 10 | 4 | 57 | 11 | 94 | 46 | Promoted | ||
| 1992-93 | English League Two | 42 | 18 | 5 | 19 | 67 | 76 | 59 | -9 | |||
| 1993-94 | English League Two | 42 | 13 | 10 | 19 | 56 | 71 | 49 | -15 | |||
| 1994-95 | English League Two | 42 | 16 | 10 | 16 | 56 | 64 | 58 | -8 | |||
| 1995-96 | English League Two | 46 | 18 | 18 | 10 | 61 | 51 | 72 | 10 | |||
| 1996-97 | English League Two | 46 | 17 | 17 | 12 | 62 | 51 | 68 | 11 | |||
| 1997-98 | English League Two | 46 | 21 | 11 | 14 | 72 | 60 | 74 | 12 | Promoted | ||
| 1998-99 | English League One | 46 | 12 | 16 | 18 | 52 | 70 | 52 | -18 | |||
| 1999-00 | English League One | 46 | 14 | 10 | 22 | 59 | 82 | 52 | -23 | |||
| 2000-01 | English League One | 46 | 15 | 12 | 19 | 55 | 59 | 57 | -4 | |||
| 2001-02 | English League One | 46 | 15 | 12 | 19 | 65 | 76 | 57 | -11 | |||
| 2002-03 | English League One | 46 | 14 | 16 | 16 | 52 | 56 | 58 | -4 | |||
| 2003-04 | English League One | 46 | 17 | 13 | 16 | 52 | 56 | 64 | -4 | |||
| 2004-05 | English League One | 46 | 14 | 17 | 15 | 60 | 50 | 59 | 10 | |||
| 2005-06 | English League One | 46 | 22 | 13 | 11 | 58 | 40 | 79 | 18 | Promoted | ||
| 2006-07 | English Championship | 46 | 20 | 9 | 17 | 70 | 56 | 69 | 14 | |||
| 2007-08 | English Championship | 46 | 7 | 17 | 22 | 62 | 86 | 38 | -24 | Relegated | ||
| 2008-09 | English League One | 46 | 18 | 9 | 19 | 58 | 58 | 63 | 0 | |||
| 2009-10 | English League One | 46 | 20 | 12 | 14 | 64 | 52 | 72 | 12 | |||
| 2010-11 | English League One | 46 | 16 | 14 | 16 | 57 | 63 | 62 | -6 | |||
| 2011-12 | English League One | 46 | 13 | 20 | 13 | 61 | 66 | 59 | -5 | |||
| 2012-13 | English League One | 46 | 14 | 9 | 23 | 47 | 68 | 51 | -21 | |||
| 2013-14 | English League One | 46 | 13 | 14 | 19 | 53 | 61 | 53 | -8 | |||
| 2014-15 | English League One | 46 | 14 | 10 | 22 | 58 | 77 | 52 | -19 | |||
| 2015-16 | English League One | 46 | 9 | 13 | 24 | 57 | 99 | 40 | -42 | Relegated | ||
| 2016-17 | English League Two | 46 | 19 | 12 | 15 | 67 | 57 | 69 | 10 | |||
| 2017-18 | English League Two | 46 | 16 | 14 | 16 | 53 | 52 | 62 | 1 | |||
| 2018-19 | English League Two | 46 | 20 | 10 | 16 | 65 | 53 | 70 | 12 | |||
| 2019-20 | English League Two | 37 | 15 | 13 | 9 | 52 | 37 | 58 | 15 | |||
| 2020-21 | English League Two | 46 | 11 | 18 | 17 | 44 | 61 | 51 | -17 | |||
| 2021-22 | English League Two | 46 | 14 | 13 | 19 | 48 | 60 | 55 | -12 | |||
| 2022-23 | English League Two | 46 | 12 | 13 | 21 | 44 | 51 | 49 | -7 |