Sæby is a town and seaport located on the east coast of the historical region of Vendsyssel in the Jutland peninsula in northern Denmark. The town is located in Frederikshavn municipality in Region Nordjylland. It has a population of 8,821 (1 January 2021). Sæby was granted market rights in 1524.

Attractions include:

• Sæby Glassblowing Workshop
• Sæby Harbour
• Sæby Church
• Fruen fra Havet: 6,25 m. high statue standing on the pier at the entrance to Sæby harbour. The statue was made by artist Marit Benthe Norheim and it was inaugurated in 2001.
• Sæby Museum
• Sæby Old Town
• Sæby Teddies (two persons in teddy-bear costumes)
• Sæby Watermill
• Sæbygaard Manor: A manor house from the renaissance. Inside there is a small museum with exhibitions of historical furniture.
• Sæby Beach
• Sæby Townsquare