USS Grant County (LST-1174) was a De Soto County-class tank landing ship built for the United States Navy during the late 1950s.

Following operations with Marines at Camp Pendleton in October, 1962 Grant County was dispatched to Florida for assignment during the Cuban Missile Crisis.

When the crisis eased, Grant County resumed her training, and remained on alert in the event of another flare-up.

Decommissioned on 15 January 1973, Grant County was transferred to the Brazilian Navy that same date where she served as Duque de Caxias (G-26).

Struck from the Naval Vessel Register 30 December 1977, she was sold to Brazil under the Security Assistance Program 1 February 1980.