The delegation is made up of Congress members Kay Granger and Steve Womack.
The Congress representatives are to meet with officials of the Saeima, Ministry of Foreign Affairs, and Ministry of Defense.
The visit is part of a larger trip, which will include stops in Germany and Kuwait.
It comes ahead of a visit by United States Vice President Joe Biden, who is slated to come to Latvia on August 23 for talks with Baltic leaders.
Granger currently serves at the Committee of Appropriations where she leads the Subcommittee on State, Foreign Operations, and Related Programs, and is the Vice-Chairwoman at the Subcommittee on Defense.
She is also a member of the Subcommittee on Transportation, Housing, and Urban Development and a senior member of the House Permanent Select Committee on Intelligence. Granger has served in Congress since 1997.
While Womack is a member of the Committee on Appropriations, Subcommittee on Financial Services and General Government, and Subcommittee on Transportation, Housing, and Related Agencies.
Womack is also a member of the Republican Study Committee. He has served in Congress since 2011.