AbstrakPerairan Karangsong adalah wilayah pesisir di Kabupaten Indramayu dan merupakan kawasan penting bagi perekonomian masyarakat setempat. Adanya rencana pengembangan serta perawatan infrastruktur di wilayah Pesisir Karangsong secara berkelanjutan diperlukan adanya penelitian mengenai batimetri, kelerengan perairan dan sedimen dasar. Tujuan dari penelitian adalah untuk mengetahui kedalaman perairan, profil perairan, kelerengan serta jenis sedimen dasar di Perairan Karangsong. Metode yang digunakan dalam penelitian adalah metode kuantitatif. Metode pengambilan data kedalaman dan sedimen dasar dilakukan di wilayah yang dianggap mewakili kerakteristik wilayah seluruhnya. Hasil penelitian menunjukkan kedalaman Perairan Karangsong, Kabupaten Indramayu berkisar antara 1 meter sampai 11 meter dengan nilai kelerengan berkisar antara 0,250• hingga 0,277• dengan rata-rata kelerengan adalah hampir datar. Perairan Karangsong, Kabupaten Indramayu memiliki tipe pasang surut campuran condong harian ganda dengan nilai nilai Formzahl sebesar 0,57. nilai-nilai elevasi Perairan Karangsong meliputi MSL 64 cm, HHWL 118,9 cm, LLWL 9,19 cm, LWL 10 cm dan HWL 110 cm. Jenis Sedimen Dasar di Perairan Karangsong, Kabupaten Indramayu adalah pasir (silt) dan pasir lanauan (silty sand). Kata kunci: Batimetri, Sedimen Dasar, Kelerengan, Perairan Karangsong. AbstractKarangsong Waters is coastral area that administratively is in the region of Indramayu regency is the important area for local society's economic. There is development planning and infrastructure maintenance in Karangsong Waters continuously it is needed there is research about batimetry, Slope and sea bottom sediment. The purpose of the research was to know the depth waters, profile of the water and also kinds of bottom sediments in the Karangsong Waters. The method in the research is quantitative method. Method of collecting the depth data and bottom sediments were do in the area which is considered to represent the characteristic of all the area. The result of the research showed the depth of Karangsong waters, regency of Indramayu about 1 meter until 11.8 meters with slope values about 0,250• until 0,277 • with almost flat category. Karangsong water, regency of Indramayu has type of tidal skewed double daily with grade Formzahl about 0,57. the water karangsong elevation values such as MSL 64 cm, HHWL 118,9 cm, LLWL 9,19 cm, LWL 10 cm and HWL 110 cm. Kinds of bottom sediments in the Karangsong water, Indramayu regency was sand and silty sand.