While a wave of decommissionings of Florida State Roads dramatically changed the map of southern Florida by the mid 1980s, a similar transformation in the Treasure Coast and Space Coast occurred in the 1980s and the 1990s. Many of the following were "tagged" as secondary or county roads by Florida Department of Transportation, but several were removed from the State Road list and transferred to county control and maintenance without such an addition of a tag onto the road signs. Most of the decommissionings occurred in sparsely-populated areas, including orange groves and wetlands that are the headwaters of Saint Johns River, and two counties - St. Lucie and Indian River - were particularly affected by the wave of decommissionings.
NOTES: some State Road numbers (like SR 609) were reused after decommissioning. Lettered State Road numbers (like SR 15A) are sometimes used for several discontinuous sections of State Roads.
State Road 5A (now Brevard County Road 5A) - Stuckway Road connecting US 1 and Interstate 95 near Scottsmoor
State Road 5A (now Indian River County Road 5A) - Old Dixie Highway from near Wabasso Road (SR 510) in Wabasso to the former SR 605 in Vero Beach
State Roads 15A and 15B (now Okeechobee County Road 15A and 15) - two short roads connecting US 98-441 (SR 15-700) and SR 710 near Up the Grove Beach
State Road 15C (now Okeechobee County Road 15C) - a spur from SR 15 near Fort Drum
State Road 402 (now Brevard County Road 402) - Max Brewer Memorial Parkway, a primary access road for Merritt Island National Wildlife Refuge and Canaveral National Seashore near Titusville
State Road 406A - a short (0.5 mile) street connecting SR 405 and SR 406 in Titusville
State Road 502 - Barnes Boulevard in Rockledge
State Road 505 (now Indian River County Road 615) - 66th Avenue between Wabasso Road (CR 510) near Sebastian and Osceola Boulevard (SR 60) near Vero Beach
State Road 505A (now Indian County Road 613) - Kings Highway/58th Avenue between Wabasso Road (CR 510) in Wabasso and Oslo Road (former State Road and current Indian County Road 606) near Vero Beach
State Road 509 (now part of Brevard County Road 509) - Minton Road in West Melbourne
State Road 511 (now part of Brevard County Road 511) - John Rodes Boulevard in West Melbourne between US 192 and SR 518
State Road 512 (now Indian River County Road 512) - Fellsmere Road from SR 60 in Saint Johns Marsh to US 1 (SR 5) in Sebastian
State Road 514 (now part of Brevard County Road 514) - Malabar Road east of Interstate 95 (SR 9) in Palm Bay and Malabar
State Road 515 (now Brevard County Road 515) - "The Scenic Trail" along the Indian River in Cocoa and Rockledge
State Road 520A - Lake Poinsett Road, a spur of SR 520 near Cocoa
State Road 603 (now part of St. Lucie County Road 603 - some maps identify it as CR 603) - Johnston Road between Indrio Road (SR 614) and the Indian County boundary near Lakewood Park
State Road 605 - stretches of Old Dixie Highway in Indian River and St. Lucie counties between Wabasso and Fort Pierce
State Road 606 - Oslo Road east of the former SR 505 near Vero Beach
State Road 607A - Angle Road in Fort Pierce
State Road 609 (now St. Lucie County Road 609 and Martin County Road 609) - Hale Dairy Road between the Glades Cut-off (former SR 709) and Bee Line Highway (SR 710) near Indiantown
State Road 609 - Header Canal Road between Okeechobee Road (SR 70) and Orange Avenue (SR 68) near Fort Pierce
State Road 609A - Shinn Road between Okeechobee Road (SR 70) and Orange Avenue (SR 68) near Fort Pierce
State Road 611 had various alignments near and in Fort Pierce, most incorporating Jenkins Road and Edwards Road
State Road 611A - Juanita Avenue between North 16th Street and US 1 in Fort Pierce
State Road 611B (now part of St. Lucie County Road 611) - Selvitz Road north of Port St. Lucie and Edwards Boulevard in Fort Pierce
State Road 612 (now Indian County Road 612) - Glendale Avenue in Vero Beach
State Road 613 (now St. Lucie County Road 613) - Sneed Road and Carlton Road in southwestern St. Lucie County
State Road 617 (now part of St. Lucie County Road 614) - Indrio Road between SR 713 and US 1 near Lakewood Park
State Road 630 - 41st Street between CR 613 (former SR 505A) and CR 605 (former SR 605) in Vero Beach
State Road 632 - South Winter Beach Road near Winter Beach
State Road 700A - Durance Road, a spur from US 98 (SR 700) near Basinger
State Road 707A (now Martin County Road 732) - Jensen Beach Boulevard in West Jensen
State Road 709 (now St. Lucie County Road 709) - the Glades Cut-off between Port Saint Lucie and Bluefield
State Road 712 (now St. Lucie County Road 712) - Midway Road from SR 70 to US 1 in and near Port St. Lucie.
State Road 723 (now Martin County Road 723) - Savannah Road in Jensen Beach
State Road 724 (now Okeechobee County Road 724) - Peavine Trail north of Basinger and Eagle Island Road west of US 441/SR 15. The eastern terminus was just south of Fort Drum.