The company had sold 9,057 units in the corresponding month last year, Ford India said in a statement.
Ford's domestic sales declined by 14.33% to 6,036 units in the reporting month from 7,046 units in the same month last year, it added.
Its overseas shipments fell by 15.81% to 1,693 units in May this year from 2,011 units in the same month last year.
"Despite the challenging market conditions, Ford is confident in the long-term future of the automotive market in India. We will continue investing to expand manufacturing and retail capacity in order to bring more great value-for-money, fun-to-drive, fuel efficient vehicles to India," Ford India President and Managing Director Michael Boneham said.
The company is working on to offer more diesel vehicles to keep up with increased demand, he added.