Grand Bay is an unincorporated community and census-designated place (CDP) in Mobile County, Alabama, United States.

[2] According to local accounts, George Cassibry was the first white person to settle in Grand Bay.

He came to the area in 1853, establishing a home site near the headwaters of Franklin Creek located today near the intersection of Highway 90 and Ramsey Road.

Postal Service established a post office at a location near the center of the current community.

[10] A weekly newspaper was published there, and telegraph service was offered to the region through an operator at Grand Bay.

Cogon grass, a highly-invasive rhizome, first introduced to the area as packing material in satsuma trees imported from Asia, has now become a serious Southeastern agricultural problem.

[17] Grand Bay is located in southwestern Mobile County at 30°28′27″N 88°20′31″W / 30.47417°N 88.34194°W / 30.47417; -88.34194 (30.474055, -88.341836),[18] along U.S. Route 90, a few miles inland from the Mississippi Sound.

The Mobile County Sheriff's Department maintains a satellite office in Grand Bay as well.

Grand Bay Water Works also provides limited sewer service for Breitling Elementary School and the business district around the Interstate 10 exchange.

The Mobile County Commission, a three-member elected panel, provides all other services including road and street repair.

Grand Bay is located within District 3 of the Mobile County Commission, which is represented by current commissioner Randall Dueitt (R).

[23] In the Alabama Legislature, Grand Bay is located within House District 105, whose current representative is Chip Brown (R).

In the US House, Grand Bay, and all of Mobile County is located within the 1st Congressional District, which is currently represented by Jerry Carl (R).

[24] The annual celebration has a long and storied history, having begun during the earliest years of the 20th Century.

As the community and surrounding area changed during World War II, the annual celebration was discontinued.

There is also a fantastic fireworks show that starts at dusk (about 8:15 p.m.) The website for the Grand Bay Watermelon Festival is: www.grandbaywatermelonfestival.org.

However, pecan production is still an important business and provides supplemental income to residents who work in nonagricultural jobs.

In addition, the area has become home to a large peach business and satsumas, once destroyed by freezing temperatures, have now returned to commercial production in a more weather-hardy variety.