The 16-page supplement will be part of ES magazine and will be distributed as part of the Standard's print run. The Standard's circulation last month was 266,575.
With original editorial content written by the T3 team, the HD supplement will include the latest news and reviews on the latest HD TVs and PCs.
Readers can also find out which next-generation disc format they should buy -- either Blu-ray or HD-DVD, with the supplement including a beginners guide to HD jargon and geek speak.
The HD supplement also offers readers a free copy of the latest issue of T3 magazine, with the option to take up a special price subscription.
It forms part of Future's ongoing sampling campaign for T3, which focuses on several major technology events this year, including the T3 Smart Home Zone at the National Home Building & Renovation Show at Excel, London from September 21 to 23.
Chris Kerwin, publisher of T3, said: "It's a privilege for T3 to be working with the Evening Standard, bringing our brand and expert knowledge to such a large and high quality audience. The world of high definition entertainment can be baffling, and having T3 guide London through this growth area of consumer electronics is a fantastic way of further increasing our profile."
The Evening Standard arrested its decline in the ABC figures for March, rising 0.2% on February to 266,575 in an otherwise uneventful month in the London market.
Despite this, the six-month average for the title still contains a dramatic 18.3% year-on-year drop to 270,729 copies.