The Conservatives have lost their grip on power at Shire Hall in Cambridge for the first time since 1997.
The council is now hung with no party having enough votes to out-vote all the others.
The Conservatives are still the biggest party with 32 seats but 3 short of an overall majority.
Regardless of the result in Thursday's election, Northamptonshire will have fewer county councils because of boundary changes.
The Tories have been sent a warning in their traditional Essex heartland, losing nine county council seats to a bullish UKIP.
Suffolk County Council has been Conservative-controlled since 2005. On Thursday there were elections for 75 councillors.