The Chutang is now an extinct river represented by a dry channel flowing through parts of Haryana and Rajasthan. It was thickly populated during proto-historic period and the present study is spatio-temporal analysis of settlements of Early, Mature and Late Harappan periods (3200 B.C. to 1800 B.C.) in the Chautang basin to understand the Harappan settlement system on a regional scale. The environmental factors are also taken into account in a great deal while demonstrating rise, development and fall of the Harappan culture in the Chautang basin. Fruther it describes 377 archaeological sites in details. Revision of chronology and re-classification ceramic assemblage of the Harappan period are also major issues discussed here in length. Fruther this book also attempts to explain a five-tiered settlement hierarchy and estimating population which existed in the Chautang basin during the Harappan period.