| Harry Mainman | |
| Fullname: | Henry Layfield Mainman |
| Birth Date: | 7 April 1877 |
| Birth Place: | Liverpool, England |
| Years1: | 1896–1897 |
| Clubs1: | Everton |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 1897–1898 |
| Clubs2: | Liverpool |
| Caps2: | 0 |
| Goals2: | 0 |
| Years3: | 1898–1900 |
| Caps3: | 64 |
| Goals3: | 9 |
| Years4: | 1900–1901 |
| Clubs4: | Reading |
| Years5: | 1901–1907 |
| Caps5: | 130 |
| Goals5: | 0 |
| Totalcaps: | 194 |
| Totalgoals: | 9 |
Henry Layfield Mainman (7 April 1877 – 1953) was an English footballer who played in the Football League for Burton Swifts and Notts County.[1]