Abstract: The characteristics of iron fractions and their differentiation in stagnic anthrosols (paddy soil) are important parameters for understanding the distribution and behavior of key elements in rice fields. This paper analyzed the iron fractions and their differentiation characteristics along 30 typical profiles (0~100 cm) at the group category level of stagnic anthrosols derived from the granite (GR), plate and shale (PS), Quaternary red clay (QRC), limestone (LS), purple sandy shale (PSS), and fluvial-lacustrine deposit (FLD) in Hunan Province. Based on classified the stagnic anthrosols according to the standards of Chinese Soil Taxonomy, Result showed to retrieve three soil groups of the hapli-stagnic anthrosols (HSA), Fe-accumulation-stagnic anthrosols (FSA), and gleyi-stagnic anthrosols (GSA), but the group of Fe-leachi-stagnic anthrosols was not observed. The mean content of total iron (Fe_t) in soil profile of stagnic anthrosols in Hunan Province is 44.66 g/kg. The mean content of iron with different fractions are as follows: crystalline iron (Fe_c)>silicate iron (Fe_si)>active iron (Fe_o)>organic-bounded iron (Fe_p). Moreover, Fe_c shows an initial increase followed by a subsequent decline in the profiles, but Fe_o and Fe_p indicate an initial decline followed by an upward trend. However, there is no obvious change for Fe_si. The mean content of Fe_c in soil derived from the PS, QRC and LS, the mean content of Fe_o in FLD, and the mean content of Fe_p in soil derived from the GR were higher than those from other parent materials, respectively. The illuvial coefficients of soils derived from the GR, PS, and QRC were higher than soils derived from the LS, PSS, and FLD. The mean content of Fe_c and illuvial coefficient of FSA, and the mean content of Fe_p in GSA were higher than those of other soil groups, respectively. This research indicated that iron fractions in stagnic anthrosols developed from 6 parent materials in Hunan Province are obviously different, and exhibit significant differentiation between profiles, parent materials, and soil groups. The characteristics of iron fractions and profile differentiation could reflect the soil development levels and soil-forming environments, and have indicative function for the genetic characteristics and Chinese Soil Taxonomy of stagnic anthrosols.