In the fall of the year 1823, Joseph C. Brown, a surveyor, ran the boundary line between Arkansas and Missouri from the southwest corner of Missouri eastward to the St. Francis River. He here left off, but in the spring of 1824 continued the line down the St. Francis River and from thence eastward to the Mississippi River. As the country was mostly under water, it was necessary for the surveyors to go in canoes to locate the line; hence the survey proved very imperfect and indefinite. It was resurveyed and was located, as established, in 1844-1845 by Davis Thompson, commissioner for Arkansas, and Governor Dunklin first, and after his death Dr. George Penn, commissioner for Missouri.
Chicot County was the next county formed on Oct. 25, 1823, out of the territory taken from Arkansas County. It was the tenth county created. Its name came from Point Chicot, a point on the Mississippi River, known of in very early times and being in its limits. The name Chicot is probably the remains of the ancient name Chisca, by which an Indian village on the opposite side of the river was called. Near this village, De Soto discovered and crossed the Mississippi River in 1541. The location of the village of Chisca (Chiz-cah), on the earliest maps is given as being east of the Mississippi River and about opposite the present city of Helena. The county seat of Chicot County was located at a place called Villemont on the Mississippi River on the tract granted by the Baron de Carondelet to Don Carlos de Villemont, the town being named after the latter. On account of the indefiniteness of the title to the land, the town could not be made to thrive, although some considerable improvements were made there. Accordingly, in 1849, the county seat was moved to the town of Columbia, where it remained for a number of years, and was then established at Lake Village, where it now is. Chicot County is in the extreme southeast corner of the state, bounded east by the Mississippi River and south by Louisiana.
Source: Hempstead's School History of Arkansas 1899.