Ladder back chairs of this type can be found in most Western nations going back 300 years, the style moving to North America with its earliest settlers. The ladder back chair is one of the earliest forms of seating in North America, each area along the original American Colonies having their own local variant in style, depending on the traditions brought with the settlers from their original home country to the New World.
Examples like this with simple turned legs and stretchers, sea grass/ rope type seats tend to be late 19th Century pieces, based on "Shaker" style examples. Most like this pair were made by rural makers for the local market and remained in production into the 1920's . Values for them are currently modest, after have great run ups in value during the late 1980's. Today pairs like this often sell at auction for less than $100.00.