| Minorplanet: | yes |
| 3318 Blixen | |
| Background: |
|
| Discovery Ref: |   |
| Discovered: | 23 April 1985 |
| Mpc Name: | (3318) Blixen |
| Alt Names: | 1985 HB1943 GP 1950 RT1953 CJ 1962 YF1970 KB 1979 DH |
| Mp Category: | main-beltEos  |
| Orbit Ref: |   |
| Epoch: | 4 September 2017 (JD 2458000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 74.16 yr (27,087 days) |
| Perihelion: | 2.8585 AU |
| Semimajor: | 3.0077 AU |
| Eccentricity: | 0.0496 |
| Period: | 5.22 yr (1,905 days) |
| Mean Motion: | / day |
| Inclination: | 11.573° |
| Asc Node: | 109.09° |
| Arg Peri: | 49.585° |
| Dimensions: | 23.5 km |
| Albedo: | |
| Spectral Type: | S  |
| Abs Magnitude: | 11.0 |
3318 Blixen, provisionally designated, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered by Danish astronomers Poul Jensen and Karl Augustesen at Brorfelde Observatory on 23 April 1985.
Blixen is a member of the Eos family, the largest asteroid family in the outer main belt consisting of nearly 10,000 asteroids. It orbits the Sun at a distance of 2.9–3.2 AU once every 5 years and 3 months (1,905 days). Its orbit has an eccentricity of 0.05 and an inclination of 12° with respect to the ecliptic.
Photometric observations of this asteroid collected during 2006 show a rotation period of 6.456 ± 0.003 hours with a brightness variation of 0.20 ± 0.02 magnitude.
This minor planet was named after Danish novelist Karen Blixen (1885–1962), best known for the memoir Out of Africa. The approved naming citation was published by the Minor Planet Center on 18 September 1986 .