| Class: | Group 2 |
| Horse Race: | Lonsdale Cup |
| Location: | York Racecourse York, England |
| Race Type: | Flat / Thoroughbred |
| Sponsor: | Weatherbys Hamilton |
| Website: | York |
| Distance: | 2m 56y (3,270 metres) |
| Surface: | Turf |
| Track: | Left-handed |
| Qualification: | Three-years-old and up |
| Weight: | 8 st 7 lb (3yo); 9 st 5 lb (4yo+) Allowances 3 lb for fillies and mares Penalties 3 lb for Group 1 winners* * after 2021 |
| Purse: | £250,000 (2022) 1st: £141,775 |
|}The Lonsdale Cup is a Group 2 flat horse race in Great Britain open to horses aged three years or older. It is run at York over a distance of 2 miles and 56 yards (3,270 metres), and it is scheduled to take place each year in August.
The event used to be called the Lonsdale Stakes, and for a period its original distance was 1 mile, 7 furlongs and 198 yards (1.9875 miles or 3198m). It was classed as a Listed race for several years, and it was promoted to Group 3 level in 1998.
The race was renamed the Lonsdale Cup and given Group 2 status in 2004. It was extended by 78 yards in 2007 to its current distance.
The Lonsdale Cup is currently held on the third day of York's four-day Ebor Festival meeting, with the leading horses from the race often going on to compete in the following month's Doncaster Cup.
Most successful horse since 1980 (3 wins):
Leading jockey since 1980 (7 wins):
Leading trainer since 1980 (5 wins):