State Road 3 (SR 3), known locally as both North Courtenay Parkway and North Kennedy Parkway is a north–south road located entirely on Merritt Island, serving as the southern access for the Kennedy Space Center near Cape Canaveral, Florida.

The shortest of the one-digit Florida State Roads, its southern terminus is an intersection with SR 520 on Merritt Island, east of Cocoa.

[2] The Florida Department of Transportation annual average daily traffic (AADT) numbers for 2012 show an average of 26,000 vehicles just north of SR 520, increasing to 29,000 just south of SR 528/SR A1A, then decreasing to 25,500 just north of its crossing with those two roads, and further decreasing to 21,500, finally halving to 12,600 as the road approaches the turn to the north-east and its northern terminus.

[5] In the meantime, SR 3 extended along the length of Tropical Trail from US 1 near Oak Hill to the southern tip of Merritt Island, where it crosses the Banana River on the Mathers Bridge (a swing span drawbridge) before turning south on South Patrick Drive (present day SR 513) and crossing the Indian River back to the mainland on the Eau Gallie Causeway (present day SR 518) and terminating at U.S. Route 1 (SR 5) in Melbourne.

Courtenay Parkway eventually was extended past SR 520 beyond the Merritt Island Airport to the historic community of Georgiana, where it meets up with the older South Tropical Trail, however this is a county facility and does not carry the state road designation.