The former Conservative leader will instead become leader of the House of Commons and provide political advice to prime minister David Cameron until the end of this parliament.
Hague will not seek re-election to his Richmond constituency, which he has represented since the age of 28.
David Cameron said Hague would still play a key role in the government.
- At least 86 people were killed in twin bomb blasts during a peace rally near the main train station in Turkey's capital. ›
- President Obama visited Oregon to meet with victims' families after last week's deadly campus shooting. Gun-rights activists protested his visit. ›
- The U.S. ended its $500 million program that trains and equips Syrian rebels in their fight against ISIS. ›