The National Association of Muslim Police (NAMP) received £90,000 in grant aid in the last two years while the Christian Police Association (CPA) received just £15,000 in the last five, despite both groups having around 2,000 members.
And the CPA even disputed those figures insisting it has only been given £10,000 over the period.
Faith-based organisations can bid for Home Office grants either for specific projects or for general funding, with officials deciding which are successful.
Don Axcell, executive director of the CPA, said other requests for additional funding had been ignored.
He said: "As a Christian charity we have to rely on the public for funds as our requests for money from government are largely rejected or ignored. Our letters go unanswered."I guess in that case it's going to need a lot more money.
Alan Craig, leader of Christian Peoples Alliance, said: "This is yet another sign of Christianity being written off the agenda.
"Christians are constantly marginalised and discriminated against by the government, who are ignoring one of this country's principle faiths."
The CPA was handed £5,000 in 2004/05 and £10,000 last year, according to Home Office figures, but Mr Axcell insisted the only grant the group has received is the one last year.
That was to help widen its involvement with local church groups and encouraged members of the public to "adopt a cop" by praying for the safety of local officers.
In contrast, the NAMP was given grants of £45,000 last year and in 2008/09, listed only as general funding.
The group was formed in July 2007 and in January this year said the Government's anti-terrorism strategy "stigmatised" Muslims. ..