On November 5, 1991 another large annexation was passed adding 2.5 square miles to the area of the city, and moving the city boundary to the north past Conway and Ladue Roads. This action was official on May 15, 1992 and completed the current boundary of the city.
The annexed area included the Maryville Office development, Maryville University, Hunter Farm, Bellerive Country Club and a number of residential subdivisions. Mason Road became the major north/south connector of this area to the rest of the city.
Prior to this annexation the city had three wards. After the annexation was finalized, a Ward 4 was established and the boundaries of Wards 1, 2, and 3 were adjusted. The political boundaries have remained the same since then as we continue to have four wards and eight aldermen.