The federal government is closing its Baltimore supply warehouse and moving its operations to the sprawling Franconia depot, making the Virginia warehouse the only government supply outlet between Pennsylvania and Richmond.

The consolidation will save taxpayers about $1.1 million a year, according to Gerald P. Carmen, administrator for the Government Services Administration, which operates the warehouses.

The Baltimore Middle River warehouse supplied furniture for all government agencies in the District, Maryland, Virginia, Pennsylvania, Delaware and West Virginia.

Federal mandates cutting back new furniture purchases for government agencies during the past three years left the Middle River warehouse operating below capacity, a GSA spokesman said.

The Franconia facility shipped about $62.3 million in supplies during the 1980 fiscal year, while the smaller Middle River depot dispensed about $8.6 million in materials.

Beginning in November, the huge 22-acre Franconia facility, which is behing the Springfield Shopping Center, will handle all deliveries -- from pencils to chairs -- for government offices in the District and the surrounding five-state area.

The move is intended to "tighten up our operations and cut down on spending," said Carmen.

The Army Adjutant General Publications Center is scheduled to take over the vacated Middle River depot, according to the GSA spokesman.

The Franconia depot now supplies all materials for government operations except furniture. Together, the two warehouses stock about 6,000 different items and ship more than 2,300 orders daily to federal offices.

The 23 employes now at the Maryland facility will be offered reassignments to the Franconia depot, the spokesman said. The GSA will assist employes who don't wish to move to Washington in transfering to other GSA or government positions in the Baltimore area.