Ann Barnes said Kent was in a unique position with the UK border and needed its officers now more than ever.
She has written to Home Secretary Theresa May to ask for funding cuts to be deferred for a year.
The government said it was taking steps to ensure law enforcement and security agencies had the resources they need.
On Monday, Mrs May said security would be "intensified" at UK borders.
Mrs Barnes said Kent was the gateway to Europe with ports, the Channel Tunnel, tunnels and bridges to the capital, and Dungeness nuclear power station.
The police force acted as the "guardians of our borders" with 35m people travelling through the county each year via ports and the Channel Tunnel, she added.
She said most were ordinary people but some were hostile, bringing in weapons or terrorist materials, and Kent needed to make sure resources were available.
The force had already lost 500 officers and 720 staff under Â£60m cuts already imposed, and another Â£61m cuts could come as the police service looked at between 25% to 40% cuts over the next four years, Mrs Barnes added.
Police minister Mike Penning said the government had undertaken significant work to strengthen its response to the threat from terrorism and had protected the counter-terrorism policing budget.
He said counter-terrorism spending across government would continue to be protected in the current spending review.
"Decisions on wider police funding will not be made until the spending review reports and the operational deployment of resources is a matter for chief constables and police and crime commissioners," he added.
The government said the Border Force worked closely with the police and National Crime Agency to prevent importation of weapons and identifying suspects.

Dave Hartnett, who was head of tax at HM Revenue & Customs, said: "I'd always expected there to be be more."
Mr Hartnett, who left HMRC in 2012, was giving evidence to the Commons Public Accounts Committee.
HSBC has come under fire over what it knew about some clients' tax affairs.
Details of some 30,000 accounts at HSBC's Geneva-based private bank were leaked to the French authorities by a whistleblower, Herve Falciani, in 2007.
Information about 3,600 UK account holders were passed to HMRC.
Both HSBC and HMRC have been accused of not doing enough to investigate if these accounts were held for the purposes of tax evasion rather than legitimate avoidance.
Mr Hartnett told the committee: "I'd like to understand why there weren't more criminal prosecutions. I'd always expected there to be more. I'd have liked to understand what would have happened if  more resources were diverted to [investigating the leaked details]."
He said there were discussions with the French authorities before the leaked information was passed to the UK, and there were also discussions with HSBC. But he never got involved in the detail, "to pressure the integrity of the investigations taking place".
But HMRC tax assurance commissioner Edward Troup insisted that his department had been "diligent" in pursuing the information received from the French.
"I don't think there is anything... which suggests that we have not been diligent," he told the committee. "We have collected Â£135m. We believe we have collected all the tax, all the interest, and a significant amount of penalties."
Mr Hartnett now works for HSBC. He said that he had followed the rules for former senior officials on taking appointments outside the civil service "to the letter".
He said: "Colleagues checked it, the Cabinet Office checked it, the committee checked it, it went to the Prime Minister, and the Financial Conduct Authority also had to approve my appointment."
Police funding cuts in Kent should be deferred in the wake of the Paris terror attacks, the county's police and crime commissioner (PCC) has said.
[NEXT_CONCEPT]
A former senior tax official has expressed "surprise" that just one person has been prosecuted in the UK over alleged tax evasion by clients of HSBC's Swiss banking division.