The following is a list of seasons played by Kastrup Boldklub from the founding of the club up to the most recent season.
| bgcolor=gold | 1st or W | Winners/Champions |
| 2nd or RU | Runners-up | |
| Promoted | ||
| Relegated | ||
| ♦ | Top scorer in division |
| Season | League | Cup | Europe / Other | Avg. Home Attendance1 | Top goalscorer(s)1 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Level | Division | P | W | D | L | F | A | Pts | Position | Competition | Result | Name | Goals | ||||||
| 1934–35 | 5 | KBUs B-række | 18 | 30 | 68 | 9 | 16th of 19 | — | |||||||||||
| 1935–36 | 5 | KBUs B-række | 17 | 21 | 83 | 4 | 18th of 18 | — | |||||||||||
| 1936–37 | 5 | KBUs B-række | 15 | 17 | 67 | 6 | 14th of 16 | — | |||||||||||
| 1937–38 | 5 | KBUs B-række | 14 | 21 | 55 | 5 | 14th of 15 | — | |||||||||||
| 1938–39 | 5 | KBUs B-række | 13 | 32 | 35 | 10 | 10th of 14 | — | |||||||||||
| 1939–40 | 5 | KBUs B-række | 13 | 27 | 47 | 8 | 11th of 14 | — | |||||||||||
| 1940–41 | 3 | KBUs B-række | 15 | 43 | 41 | 15 | 9th of 16 | — | |||||||||||
| 1941–42 | 3 | KBUs B-række | 18 | 64 | 39 | 25 | 5th of 19 | — | |||||||||||
| 1942–43 | 3 | KBUs B-række | 17 | 74 | 23 | 27 | 3rd of 18 | — | |||||||||||
| 1943–44 | 3 | KBUs B-række | 18 | 76 | 43 | 32 | 2nd of 19 | — | |||||||||||
| 1944–45 | 3 | KBUs B-række | 14 | 39 | 20 | 19 | 4th of 15 | — | |||||||||||
| 1945–46 | 5 | KBUs B-række | 15 | ? of 16 | — | ||||||||||||||
| 1946–47 | 5 | KBUs B-række | 15 | 39 | 40 | 16 | 8th of 16 | — | |||||||||||
| 1947–48 | 6 | KBUs A-række | 18 | 52 | 27 | 26 | 2nd of 10 | — | |||||||||||
| 1948–49 | 6 | KBUs A-række | 18 | 66 | 18 | 26 | 2nd of 10 | — | |||||||||||
| 1949–50 | 6 | KBUs A-række | 18 | 71 | 17 | 30 | bgcolor=#CCFFCC | 1st of 10 | — | ||||||||||
| 1950–51 | 5 | KBUs Mellemrække | 18 | 42 | 22 | 22 | 4th of 10 | — | |||||||||||
| 1951–52 | 5 | KBUs Mellemrække | 18 | 45 | 29 | 22 | 3rd of 10 | — | |||||||||||
| 1952–53 | 5 | KBUs Mellemrække | 18 | 66 | 27 | 28 | bgcolor=#CCFFCC | 1st of 10 | — | ||||||||||
| 1953–54 | 4 | Copenhagen Series | 18 | 6th of 10 | — | ||||||||||||||
| 1954–55 | 4 | Copenhagen Series | 18 | 1st of 10 | — | ||||||||||||||
| 1955–56 | 4 | Copenhagen Series | 18 | 5th of 10 | — | ||||||||||||||
| 1956–57 | 4 | Copenhagen Series | 18 | 4th of 10 | — | ||||||||||||||
| 1958 | 4 | Copenhagen Series | 18 | 5th of 10 | — | ||||||||||||||
| 1959 | 5 | Copenhagen Series | 18 | bgcolor=#CCFFCC | 1st of 10 | — | |||||||||||||
| 1960 | 4 | Kvalifikationsturneringen | 22 | 12 | 5 | 5 | 41 | 27 | 29 | 3rd of 12 | — | ||||||||
| 1961 | 4 | Kvalifikationsturneringen | 22 | 3 | 5 | 14 | 26 | 62 | 11 | bgcolor=#FFCCCC | 11th of 12 | — | |||||||
| 1962 | 5 | Copenhagen Series | 18 | 4th of 10 | — | ||||||||||||||
| 1963 | 5 | Copenhagen Series | 18 | 4th of 10 | — | ||||||||||||||
| 1964 | 5 | Copenhagen Series | 18 | 2nd of 10 | — | ||||||||||||||
| 1965 | 5 | Copenhagen Series | 22 | 8th of 12 | — | ||||||||||||||
| 1966 | 5 | Copenhagen Series | 22 | 1st of 12 | — | ||||||||||||||
| 1967 | 5 | Copenhagen Series | 22 | bgcolor=#CCFFCC | 1st of 12 | — | |||||||||||||
| 1968 | 4 | Denmark Series, Group 1 | 22 | 6th of 12 | — | ||||||||||||||
| 1969 | 4 | Denmark Series, Group 1 | 22 | bgcolor=#CCFFCC | 1st of 12 | — | |||||||||||||
| 1970 | 3 | 3rd Division East | 22 | 5 | 6 | 11 | 23 | 34 | 16 | 9th of 12 | — | ||||||||
| 1971 | 3 | 3rd Division East | 22 | 10 | 4 | 8 | 39 | 41 | 24 | 5th of 12 | — | ||||||||
| 1972 | 3 | 3rd Division East | 22 | 7 | 7 | 8 | 38 | 39 | 21 | 6th of 12 | — | ||||||||
| 1973 | 3 | 3rd Division East | 22 | 14 | 2 | 6 | 48 | 28 | 30 | 3rd of 12 | — | ||||||||
| 1974 | 3 | 3rd Division East | 22 | 14 | 4 | 4 | 51 | 23 | 32 | bgcolor=#CCFFCC | 1st of 12 Won Division title final | — | |||||||
| 1975 | 2 | 2nd Division | 30 | 19 | 7 | 4 | 70 | 37 | 45 | bgcolor=#CCFFCC | 1st of 16 | — | |||||||
| 1976 | 1 | 1st Division | 30 | 9 | 8 | 13 | 38 | 45 | 26 | 10th of 16 | — | ||||||||
| 1977 | 1 | 1st Division | 30 | 14 | 6 | 10 | 45 | 36 | 34 | 6th of 16 | — | ||||||||
| 1978 | 1 | 1st Division | 30 | 9 | 7 | 14 | 38 | 40 | 25 | 11th of 16 | — | ||||||||
| 1979 | 1 | 1st Division | 30 | 13 | 11 | 6 | 45 | 30 | 37 | 4th of 16 | — | ||||||||
| 1980 | 1 | 1st Division | 30 | 9 | 9 | 12 | 34 | 35 | 27 | 13th of 16 | IC | G2, 3rd | |||||||
| 1981 | 1 | 1st Division | 30 | 6 | 11 | 13 | 30 | 42 | 23 | bgcolor=#FFCCCC | 14th of 16 | — | |||||||
| 1982 | 2 | 2nd Division | 30 | 15 | 9 | 6 | 40 | 26 | 39 | 4th of 16 | — | ||||||||
| 1983 | 2 | 2nd Division | 30 | 13 | 11 | 6 | 46 | 22 | 37 | 4th of 16 | — | ||||||||
| 1984 | 2 | 2nd Division | 30 | 18 | 5 | 7 | 51 | 29 | 41 | bgcolor=#CCFFCC | 3rd of 16 | — | |||||||
| 1985 | 1 | 1st Division | 30 | 12 | 6 | 12 | 35 | 37 | 30 | 9th of 16 | — | ||||||||
| 1986 | 1 | 1st Division | 26 | 4 | 6 | 16 | 19 | 39 | 14 | 12th of 14 | — | ||||||||
| 1987 | 1 | 1st Division | 26 | 1 | 6 | 19 | 19 | 62 | 8 | bgcolor=#FFCCCC | 14th of 14 | — | |||||||
| 1988 | 2 | 2nd Division | 26 | 3 | 8 | 15 | 27 | 56 | 14 | bgcolor=#FFCCCC | 14th of 14 | — | |||||||
| 1989 | 3 | 3rd Division East | 26 | 7 | 9 | 10 | 34 | 46 | 23 | 10th of 14 | — | ||||||||
| 1990 | 3 | 3rd Division West | 26 | 12 | 9 | 5 | 48 | 31 | 33 | 4th of 14 | — | ||||||||
| 1991 spring | 3 | 2nd Division East, playoffs | 18 | 4 | 5 | 9 | 23 | 29 | 13 | 10th of 10 | — | ||||||||
| 1991 autumn | 3 | 2nd Division East, preliminary play | 18 | 5 | 4 | 9 | 19 | 21 | 14 | 8th of 10 | — | ||||||||
| 1992 spring | 4 | 2nd Division East, playoffs | 14 | 5 | 4 | 5 | 17 | 18 | 14 | 5th of 8 | — | ||||||||
| 1992 autumn | 3 | 2nd Division East, preliminary play | 18 | 5 | 5 | 8 | 24 | 31 | 19 | 8th of 10 | — | ||||||||
| 1993 spring | 4 | 2nd Division East, playoffs | 14 | 5 | 5 | 4 | 15 | 4th of 8 | — | ||||||||||
| 1993 autumn | 3 | 2nd Division East, preliminary play | 18 | 4 | 5 | 9 | 25 | 38 | 18 (5) | 8th of 10 | — | ||||||||
| 1994 spring | 4 | 2nd Division East, playoffs | 14 | 4 | 3 | 7 | 20 | 36 | 11 | 5th of 8 | — | ||||||||
| 1994 autumn | 3 | 2nd Division East, preliminary play | 18 | 7 | 1 | 10 | 32 | 42 | 19 (4) | 8th of 10 | — | ||||||||
| 1995 spring | 4 | 2nd Division East, playoffs | 14 | 0 | 1 | 13 | 8 | 43 | 1 | 8th of 8 | — | ||||||||
| 1995 autumn | 3 | 2nd Division East | 14 | 4 | 3 | 7 | 30 | 32 | 15 | bgcolor=#FFCCCC | 7th of 8 | — | |||||||
| 1996 | 4 | Denmark Series, Group 1 | 26 | 14 | 4 | 8 | 64 | 46 | 46 | 3rd of 14 | — | ||||||||
| 1997 | 4 | Denmark Series, Group 1 | 26 | 6 | 7 | 13 | 49 | 61 | 25 | 12th of 14 | — | ||||||||
| 1998 | 5 | Denmark Series, Group 1 | 26 | 5 | 4 | 17 | 32 | 62 | 19 | bgcolor=#FFCCCC | 12th of 14 | — | |||||||
| 1999 | 6 | Copenhagen Series | 26 | 14 | 6 | 6 | 47 | 32 | 48 | 4th of 14 | — | ||||||||
| 2000 | 6 | Copenhagen Series | 26 | 7 | 6 | 13 | 52 | 51 | 27 | 11th of 14 | — | ||||||||
| 2001 | 6 | Copenhagen Series | 26 | 12 | 7 | 7 | 45 | 31 | 43 | 6th of 14 | — | ||||||||
| 2001 | 6 | Copenhagen Series | 26 | 12 | 7 | 7 | 45 | 31 | 43 | 6th of 14 | — | ||||||||
| 2002 | 6 | Copenhagen Series | 26 | 9 | 5 | 12 | 47 | 50 | 32 | 7th of 14 | — | ||||||||
| 2003 | 62 | Reserve team for Amager United | |||||||||||||||||
| 2004 | 62 | Reserve team for Amager United | |||||||||||||||||
| 2005 spring | 52 | Reserve team for Amager United | |||||||||||||||||
| 2005–06 | 42 | Reserve team for Amager United | |||||||||||||||||
| 2006–07 | 42 | Reserve team for Amager United | |||||||||||||||||
| 2007–08 | 4 | Denmark Series, Group 1 | 30 | 12 | 4 | 14 | 48 | 54 | 45 | 9th of 16 | R1 | — | |||||||
| 2008–09 | 43 | Denmark Series, Group 1 | 26 | 11 | 5 | 10 | 39 | 34 | 38 | bgcolor=#FFCCCC | 8th of 14 Administrative regulation | — | |||||||
| 2009–10 | 6 | KBU Series 1, Group 1 | 26 | 17 | 2 | 7 | 76 | 39 | 53 | 4th of 14 | — | ||||||||
| 2010–11 | 6 | DBU Copenhagen Series 1, Group 1 | 26 | 19 | 4 | 3 | 90 | 32 | 61 | bgcolor=#CCFFCC | 2nd of 14 | R3 | — | ||||||
| 2011–12 | 5 | Copenhagen Series | 26 | 14 | 10 | 2 | 57 | 24 | 52 | bgcolor=#CCFFCC | 2nd of 14 Won promotion playoffs | R2 | — | ||||||
| 2012–13 | 4 | Denmark Series, Group 1 | 26 | 4 | 9 | 13 | 34 | 44 | 21 | bgcolor=#FFCCCC | 13th of 14 | QR3 | — | Martin Skov Petersen | bgcolor=#FFE4B5 | 17 ♦ | |||
| 2013–14 | 5 | Copenhagen Series | 26 | 17 | 2 | 7 | 54 | 36 | 53 | bgcolor=#CCFFCC | 1st of 14 | QR4 | — | ||||||
| 2014–15 | 4 | Denmark Series, Group 1 | 26 | 9 | 7 | 10 | 49 | 48 | 34 | 7th of 14 | QR4 | — | Martin Skov Petersen | 15 | |||||
| 2015–16 | 4 | Denmark Series, Group 1 | 26 | 13 | 7 | 6 | 51 | 40 | 46 | 2nd of 14 Lost promotion playoffs | QR4 | — | Kristoffer Heeris | 14 | |||||
| 2016–17 | 4 | Denmark Series, Group 1 | 27 | 12 | 4 | 11 | 46 | 42 | 40 | 5th of 10 | — | ||||||||
| 2017–18 | 4 | Denmark Series, Group 1 | 27 | 7 | 8 | 12 | 46 | 64 | 29 | 7th of 10 | — | ||||||||
| 2018–19 | 4 | Denmark Series, Group 2 | 27 | — | |||||||||||||||
1: League games only, not including championship, promotion and relegation play-offs
2: Status as reserve team for Amager United. Amager United played using Kastrup Boldklub's league license
3: Status as reserve team for FC Amager