The award which is supported by Natural England, is open to entries from local authorities, NGOs and charities based in the UK.
Entry is free and the winner will go on to represent Britain and compete for the Landscape Award of the Council of Europe.
Natural England chief executive Helen Phillips said: "The UK Landscape Awards are an opportunity to showcase work that will inspire others and demonstrate the value and importance of landscapes across the UK.
"We encourage communities up and down the country to celebrate and nominate the landscapes that matter to them."
President of the Landscape Institute, Jo Watkins, said of the award: "This is a great opportunity to highlight the tremendous contribution that excellent urban and rural landscapes make to the creation of strong communities. I urge everyone involved in landscape projects to consider entering the award."
Paul Lincoln, director of policy and communications at the Landscape Institute said: "We are just getting entrants in and each time you register we put you on a map, which then becomes a map of all the schemes. And if you click on each bubble on the online map it gives you more details of each entrant."
Lincoln added: "At the end we will not only have found the UK’s best landscape but we will have built a mapped database which we will keep.
"It’s the first time this has been done in the UK and I think if you get through to representing Britain at the EU level, it will be a great opportunity to tell people about what landscape we have out there."
The winner will be announced on November 8 at the UK Landscape Conference in Liverpool and the winner of the European Landscape Award will be announced in March 2011.
Entries for the awards close on August 27 and are submitted online at www.uklandscapeaward.org