Bastrop is the largest city and the parish seat of Morehouse Parish, Louisiana, United States. The population was 11,365 at the 2010 census, a decrease of 1,623 from the 12,988 tabulation of 2000. The population of Bastrop is 73 percent African American. It is the principal city of and is included in the Bastrop, Louisiana Micropolitan Statistical Area, which is included in the Monroe-Bastrop, Louisiana Combined Statistical Area.