Attendance records
HIGHEST
Old Show Ground
Overall / Cup: 23,935 v Portsmouth - FA Cup Round Four - January 30, 1954
League: 19,076 v Grimsby Town - Division Three North - April 2, 1956
Glanford Park
Overall / Cup: 9,077 v Manchester United - League Cup Round three - September 22, 2010
League: 8,921 v Newcastle United - Championship - October 20, 2009
LOWEST
Old Show Ground
Overall / Cup: 972 v Hartlepool United - Associate Member Cup Group - December 2, 1986
League: 1,106 v Bury - Division Four - May 4, 1982
Glanford Park
Overall / Cup: 572 v Leicester City U21 - Leasing.com Trophy - September 24, 2019
League: 1,524 v Chester City - Division Three - February 18, 1997
Record Attendances Per Competition
The highest ever attendance to watch the Iron came in the 2008/09 play-off final at Wembley Stadium, but the biggest at a domestic ground for the the FA Cup Round Three tie at Roker Park, Sunderland in 1952/53 when a crowd of 56,507 gathered to watch a 1-1 draw.
The following are the record attendances as per competitions, home and away.
DIVISION THREE NORTH
HOME - Grimsby Town - 19,067 - February 2, 1956
AWAY - Grimsby Town - 23,399 - March 3, 1956
DIVISION TWO
HOME - Sheffield Wednesday - 17,488 - September 27, 1958
AWAY - Liverpool - 46,837 - September 9, 1961
DIVISION THREE
HOME - Hull City - 15,570 - January 29, 1966
AWAY - Middlesbrough - 19,005 - January 21, 1967
DIVISION FOUR
HOME - Grimsby Town - 11,754 - October 16, 1971
AWAY - Lincoln City - 16,498 - March 18, 1972
HOME - Rotherham United - 8,775 - May 1, 1989 (at Glanford Park)
DIVISION TWO (post 1992)
HOME - Burnley - 5,862 - May 6, 2000
AWAY - Preston North End - 15,518 - April 22, 2000
DIVISION THREE (post 1992)
HOME - Cardiff City - 7,407 - May 8, 1993
AWAY - Cardiff City - 12,455 - May 1, 1999
CHAMPIONSHIP (post 2004)
HOME - Newcastle United - 8,921 - October 20, 2009
AWAY - Newcastle United - 39,301 - March 17, 2010
LEAGUE ONE (post 2004)
HOME - Nottingham Forest - 8,906 - March 10, 2007
AWAY - Sheffield United - 27,980 - February 18, 2017
LEAGUE TWO (post 2004)
HOME - Grimsby Town - 8,054 - November 6, 2004
AWAY - Portsmouth - 14,550 - November 23, 2013
PLAY-OFFS
HOME - Torquay United - 6,483 - May 18, 1988 (Old Show Ground)
HOME - Lincoln City - 8,295 - May 14, 2003 (Glanford Park)
AWAY - Milton Keynes Dons - 14,479 - May 15, 2009
EFL TROPHY
HOME - Rotherham United - 6,038 - January 19, 2009
AWAY - Rotherham United - 6,555 - February 17, 2009
FA CUP
HOME - Portsmouth - 23,935 - January 30, 1954 (Old Show Ground)
HOME - Manchester City - 8,861 - January 23, 2010 (Glanford Park)
AWAY - Sunderland - 56,507 - January 10, 1953
LEAGUE CUP
HOME - Arsenal - 17,230 - September 25, 1968 (Old Show Ground)
HOME - Manchester United - 9,077 - September 22, 2010 (Glanford Park)
AWAY - Manchester City - 36,358 - October 28, 2009
WEMBLEY STADIUM
League One Play-Off Final 2008/09
Millwall - 59,661 - May 24, 2009
Average Home League Attendances
| SEASON | DIVISION | POSITION | ATT HIGH | ATT LOW | AVERAGE | AGGREGATE |
| 1950/51 | Division Three North | 12th | 14,840 | 5,083 | 9,500 | 218,492 |
| 1951/52 | Division Three North | 14th | 15,734 | 4,046 | 8,295 | 190,774 |
| 1952/53 | Division Three North | 15th | 18,876 | 4,250 | 7,568 | 174,066 |
| 1953/54 | Division Three North | 3rd | 12,630 | 5,187 | 8,224 | 189,148 |
| 1954/55 | Division Three North | 3rd | 15,547 | 4,155 | 8,961 | 206,110 |
| 1955/56 | Division Three North | 9th | 19,067 | 3,780 | 7,704 | 177,194 |
| 1956/57 | Division Three North | 14th | 11,004 | 3,324 | 6,232 | 143,338 |
| 1957/58 | Division Three North | 1st | 11,636 | 7,591 | 9,546 | 210,088 |
| 1958/59 | Division Two | 18th | 17,488 | 9,305 | 12,404 | 260,481 |
| 1959/60 | Division Two | 15th | 15,384 | 6,537 | 11,106 | 233,227 |
| 1960/61 | Division Two | 9th | 13,952 | 5,762 | 9,187 | 192,934 |
| 1961/62 | Division Two | 4th | 13,988 | 6,981 | 9,662 | 202,911 |
| 1962/63 | Division Two | 9th | 14,053 | 5,797 | 8,858 | 186,017 |
| 1963/64 | Division Two | 22nd | 10,793 | 4,986 | 7,132 | 149,767 |
| 1964/65 | Division Three | 18th | 10,867 | 2,755 | 5,505 | 126,614 |
| 1965/66 | Division Three | 4th | 15,570 | 2,766 | 5,188 | 119,329 |
| 1966/67 | Division Three | 18th | 11,105 | 3,544 | 5,108 | 117,489 |
| 1967/68 | Division Three | 24th | 6,886 | 2,475 | 3.833 | 88,170 |
| 1968/69 | Division Four | 16th | 6,650 | 1,850 | 3,639 | 83,701 |
| 1969/70 | Division Four | 12th | 7,154 | 2,582 | 4,274 | 98,299 |
| 1970/71 | Division Four | 17th | 6,945 | 2,568 | 3,809 | 87,814 |
| 1971/72 | Division Four | 4th | 11,510 | 3,776 | 5,840 | 134,330 |
| 1972/73 | Division Three | 24th | 10,540 | 1,544 | 3,579 | 82,325 |
| 1973/74 | Division Four | 18th | 5,582 | 1,715 | 2,870 | 63,129 |
| 1974/75 | Division Four | 24th | 5,463 | 1,037 | 2,000 | 46,009 |
| 1975/76 | Division Four | 19th | 10,329 | 1,502 | 2,902 | 66,741 |
| 1976/77 | Division Four | 20th | 7,003 | 1,883 | 3,352 | 77,087 |
| 1977/78 | Division Four | 14th | 7,612 | 1,803 | 3,153 | 72,525 |
| 1978/79 | Division Four | 12th | 8,008 | 1,226 | 2,557 | 58,806 |
| 1979/80 | Division Four | 14th | 4,465 | 1,471 | 2,136 | 49,135 |
| 1980/81 | Division Four | 16th | 4,848 | 1,325 | 2,319 | 53,329 |
| 1981/82 | Division Four | 23rd | 8,105 | 1,106 | 2,208 | 50,785 |
| 1982/83 | Division Four | 4th | 7,483 | 1,309 | 3,575 | 82,214 |
| 1983/84 | Division Three | 23rd | 8,286 | 2,127 | 3,339 | 76,802 |
| 1984/85 | Division Four | 9th | 2,902 | 1,212 | 2,066 | 47,513 |
| 1985/86 | Division Four | 15th | 2,495 | 1,238 | 1,778 | 40,883 |
| 1986/87 | Division Four | 8th | 4,299 | 1,545 | 2,126 | 48,900 |
| 1987/88 | Division Four | 4th | 6,736 | 1,969 | 3,236 | 74,417 |
| 1988/89 | Division Four | 4th | 8,775 | 2,999 | 4,547 | 104,578 |
| 1989/90 | Division Four | 11th | 8,384 | 2,226 | 3,522 | 81,007 |
| 1990/91 | Division Four | 8th | 5,769 | 2,220 | 3,114 | 71,629 |
| 1991/92 | Division Four | 5th | 5,303 | 2,224 | 3,219 | 67,591 |
| 1992/93 | Division Three | 14th | 7,407 | 1,970 | 3,147 | 66,077 |
| 1993/94 | Division Three | 11th | 4,587 | 2,122 | 3,182 | 66,816 |
| 1994/95 | Divsion Three | 7th | 4,785 | 2,079 | 2,917 | 61,259 |
| 1995/96 | Division Three | 12th | 4,847 | 1,615 | 2,434 | 55,983 |
| 1996/97 | Division Three | 13th | 4,257 | 1,524 | 2,606 | 59,936 |
| 1997/98 | Division Three | 8th | 4,905 | 2,024 | 3,009 | 69,201 |
| 1998/99 | Division Three | 4th | 5,633 | 2,421 | 3,741 | 86,034 |
| 1999/00 | Division Two | 23rd | 5,862 | 2,686 | 4,064 | 93,462 |
| 2000/01 | Division Three | 10th | 6,101 | 2,523 | 3,446 | 79,263 |
| 2001/02 | Division Three | 8th | 6,479 | 2,574 | 3,784 | 87,045 |
| 2002/03 | Division Three | 5th | 6,284 | 2,342 | 3,692 | 84,916 |
| 2003/04 | Division Three | 22nd | 6,426 | 2,512 | 3,840 | 85,993 |
| 2004/05 | League Two | 2nd | 8,054 | 3,402 | 5,178 | 119,090 |
| 2005/06 | League One | 12th | 7,152 | 3,786 | 5,191 | 119,391 |
| 2006/07 | League One | 1st | 8,906 | 3,473 | 5,669 | 130,384 |
| 2007/08 | Championship | 23rd | 8,801 | 4,407 | 6,434 | 147,987 |
| 2008/09 | League One | 6th | 8,315 | 3,423 | 5,019 | 115,429 |
| 2009/10 | Championship | 20th | 8,921 | 4,995 | 6,463 | 148,663 |
| 2010/11 | Championship | 24th | 8,122 | 4,190 | 5,547 | 127,602 |
| 2011/12 | League One | 18th | 6,047 | 3,409 | 4,332 | 99,402 |
| 2012/13 | League One | 21st | 6,020 | 2,382 | 3,465 | 79,692 |
| 2013/14 | League Two | 2nd | 7,482 | 3,005 | 4,013 | 92,296 |
| 2014/15 | League One | 16th | 5,550 | 2,773 | 3,646 | 83,867 |
| 2015/16 | League One | 7th | 7,275 | 2,596 | 3,907 | 89,852 |
| 2016/17 | League One | 3rd | 6,243 | 3,168 | 4,535 | 104,303 |
| 2017/18 | League One | 5th | 6,359 | 3,120 | 4,364 | 100,368 |
| 2018/19 | League One | 23rd | 7,263 | 3,054 | 4,227 | 97,215 |
| 2019/20 | League Two | 20th | 6,855 | 2,746 | 3,546 | 67,382* |
| 2020/21 | League Two | 22nd | 0 | 0 | 0 | 0 |
| 2021/22 | League Two | 24th | 5,014 | 2,009 | 2,781 | 66,737 |
| 2022/23 | National League |
*From 19 league games out of 23, due to the curtailing of the season following the COVID-19 pandemic