Kosmos 11 (Russian: Космос 11 meaning Cosmos 11), also known as DS-A1 No.1 was a technology demonstration satellite which was launched by the Soviet Union in 1962. It was the eleventh satellite to be designated under the Kosmos system, and the fourth spacecraft launched as part of the DS programme to successfully reach orbit, after Kosmos 1, Kosmos 6 and Kosmos 8. Its primary mission was to demonstrate technologies for future Soviet military satellites.
Kosmos 11 was placed into a low Earth orbit with a perigee of 240 km (150 mi), an apogee of 858 km (533 mi), 48.9 degrees of inclination, and an orbital period of 95.6 minutes. It decayed on 18 May 1964. Kosmos 11 was the first of seven DS-A1 satellites to be launched. The next DS-A1 launched was Kosmos 17, in May 1963.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.