Average Internet Speed in South Korea

Internet in South Korea: what the data shows

At a median 134.9 Mbps download, South Korea sits inside the top tenth of the table: #2 of 119 ranked countries, 4× the global median of 33.9 Mbps. The world's fastest median belongs to the United States at 144 Mbps, within striking distance.

The median upload is 106.3 Mbps, about 79% of the download rate: the balance typical of a market mixing fibre with cable or DSL plans. Median latency is 20 ms. Round trips that short keep video calls, cloud gaming and remote desktops feeling instant.

SK Broadband tops the measured providers at 284 Mbps, about 2.1× the national median, so switching networks can matter as much as switching plans.

Desktop and mobile tests land close together (128 and 145 Mbps), so the experience translates across devices; mobile accounts for 41% of tests. By operating system, Mac OS devices record the quickest median (198 Mbps) while Windows sits at 115 Mbps, usually a proxy for the networks and hardware each platform rides on rather than the software itself.

Tests from South Korea most often reached the Seoul test server (96% of the top-server mix), so the figures reflect the routes everyday traffic actually takes. Every number on this page is a median of single-stream browser tests from the H1 2026 window: Real-World Speed, measured on the open internet rather than inside an ISP's own network. It reads lower than peak-rate tests by design, and every country is measured with the same ruler.