Katharine Anne Ussher (born 18 March 1971) is a British economist and former Labour Party politician who is now Chief Economist at Demos think tank.
After training as an economist, she was elected Member of Parliament (MP) for Burnley at the 2005 general election, succeeding Peter Pike.
She served as a minister in Gordon Brown's government from 2007 to 2009, mainly at the Treasury, but also at the Department for Work and Pensions.
She did not stand at the 2010 election, citing the desire for a more normal family life while her children were young.