Ratchadaphisek (รัชดาภิเษก) is the district that follows Ratchadaphisek Road. It is located north of Sukhumvit, east of Phahonyothin and west of Ramkhamhaeng. The small portion of Ratchadaphisek Road at the Queen Sirikit National Convention Centre is dealt with under Sukhumvit.

Ratchadaphisek, which generally is shortened to just Ratchada, breathes entertainment. While Sukhumvit's clubbing scene is probably the most impressive, it must be said that it is totally overrun by expats. Ratchada's clubs, bars, cinemas, massage parlors and shopping malls almost exclusively cater to the local Thai audience (foreigners are welcome though). Saturdaynights are busiest, with Thai students in their late teens and early 20s flocking in great numbers to "RCA" , a pedestrian-only road that stands for Royal City Avenue. Being a government-designated-entertainment zone, clubs here stay open till 2AM, which is one hour longer than outside these zones. The bars and clubs have spilled over beyond RCA onto the many sois Ratchadaphisek is rich.

Meanwhile, Chinese and Japanese mass tourism have discovered Ratchadaphisek, and now there are many hotels and seafood restaurants fulfilling their demand. Western tourists, however, still come in surprisingly few numbers. Besides going out and fine dining, don't expect to actually see anything interesting at this long, rather soulless road.

Orientation is quite straightforward. Ratchdaphisek Road is the main road that crosses right through the district from north to south. It is the transportation hub of the district due to the MRT metro system that runs right beneath it. Many of Ratchadaphisek's sois intersect with the main road, with the uneven numbers at the west side and the even numbers at the east side.