The Old Southeast neighborhood is a historic neighborhood located in St. Petersburg, Florida. It is located south of Downtown St. Petersburg and east of the University of South Florida St. Petersburg campus. The neighborhood is bordered by Tampa Bay to the east and Fourth Street to the west.

The Old Southeast neighborhood was established in the early 1900s and is known for its historic bungalows and tree-lined streets. The neighborhood is listed on the National Register of Historic Places and has been recognized for its historic significance and architectural character.

Today, the Old Southeast neighborhood is a vibrant and diverse community that is home to a mix of families, young professionals, and retirees. The neighborhood is known for its community events, such as the Old Southeast Market, which features local vendors and live music, and the Old Southeast Porchfest, which is a neighborhood-wide music festival.

The neighborhood is also home to several parks and recreational areas, including Lassing Park, which offers views of Tampa Bay, and Bartlett Park, which features a community pool, tennis courts, and a playground. The Old Southeast neighborhood is a popular destination for those who enjoy walking, biking, and outdoor activities.

Old Southeast currently has 17 single family homes for sale with an average list price of $1,300,734.65, 3 townhouses for sale with an average list price of $820,000, and 3 lots for sale with an average list price of $1,140,000. The average annual property tax for Old Southeast is $4,875.25.