| Native Name Lang: | de |
| Birth Date: | 16 December 1925 |
| Birth Place: | , Prussia, Weimar Republic |
| Death Place: | Steeg, North Rhine-Westphalia, Germany |
| Fields: | phytogeography, ecology, botany |
| Workplaces: | University of Stuttgart-Hohenheim, University of Hawaii, University of North Carolina, University of Osnabrück |
| Alma Mater: | University of Cologne |
| Thesis1 Title: | and |
| Thesis2 Title: | )--> |
| Thesis1 Url: | and |
| Thesis2 Url: | )--> |
| Thesis Year: | 1953 |
| Thesis1 Year: | and |
| Thesis2 Year: | )--> |
| Doctoral Advisors: | )--> |
| Known For: | Climate diagrams |
| Author Abbrev Bot: | Lieth |
| Spouse: | Magdalena Roth |
| Partners: | )--> |
| Children: | 4 |
Friedrich Heinrich Helmut Lieth (16 December 1925) was a German ecologist, botanist and phytogeographer.[1]
Lieth received his doctorate in Biology from the University of Cologne in 1953 and became a private lecturer at the University of Stuttgart-Hohenheim in 1960. He was then visiting professor in Venezuela and Colombia, professor of botany at the University of Hawaii and at the University of North Carolina at Chapel Hill. From 1977 to 1992 he was a professor at the University of Osnabrück where he held the chair for ecology.[2]
Helmut Lieth married Magdalena Roth in 1952. The couple had a daughter and three sons.[2]
Lieth became widely known through the climate diagram world atlas published together with Heinrich Walter between 1960 and 1967. The descriptive form of climate display (the Walter-Lieth climate diagram) conceived here received the highest international recognition.