Saint Mary Parish is in Cajun Country Louisiana. Of the 64 counties in the state, Saint Mary Parish ranks 11th in terms of size (716,430 acres). Louisiana's Saint Mary Parish has about 1,000 acres of residential land and property for sale based on recent Land Network data. The combined market value of farms, hunting land and other rural land and acreage for sale here was nearly $10 million. The average price of residential land for sale in Saint Mary Parish was $346,471. Browse all residential land and rural property for sale in Louisiana to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.