Sichon district stands on the northern of Nakhon Si Thammarat province. It stands on the southern of Thailand. Sichon district has territory abut to others district thus:
-North abut to Khanhom district
-East abut to the Gulf of Thailand
-South abut to Thasala district and Nobpitam district
-West abut to Kanjanadit district and Donsak district of Suratthanee province