Education chiefs have congratulated pupils but say there could be an issue with results in English.
Mark Patton, Hartlepool Borough Council’s assistant director (education), said: “The town’s 16-year-olds have every reason to be proud of their achievements, which reflect a lot of hard work by themselves and by the staff in their schools.
“However, there seem to be some issues with English results this year, which in some cases are lower than anticipated. This is also the case in a number of other North-East local authority areas and we will be taking a close look at this in the coming days.
“At this early stage our overall GCSE results in 2015 are about 2% lower than last year. Some of our schools are reporting improvements on last year, others a slight dip.
“Nationally, the overall GCSE results seem to be similar to last year but some local authorities are reporting large variations. A fuller picture in Hartlepool and nationally will emerge in the days ahead.
“I want to thank the school staff, parents and carers of all our students for the support they give their young people to help them to achieve at school.”
Councillor Chris Simmons, chair of the council’s Children’s Services Committee, said: “From the early indications, it would appear that our overall results have dipped slightly this year.
“We will be looking in detail at the results in English because we want to ensure that our young people get the grades that reflect all the hard work they have put into their studies.”
He added: “I would like to congratulate all the students – they have worked very hard for their GCSEs - and I wish them all the very best as they take their next steps into further education or training.”