Looking for condominiums for sale in Key Largo? Browse all Key Largo MLS listings of condos below. The Key Largo real estate market is great for buyers who are looking to experience the full Florida Keys living experience - the tropical climate and laid back atmosphere - while at the same time being located nearer to the mainland and major cities than anywhere else in the Keys. Key Largo condo units are popular with those looking to seamlessly combine these two elements. Some of the most popular communities include Mariner's Club and The Sanctuary.