The River Asker is a small river in West Dorset, England. It rises on the chalk slopes of Eggardon Hill, approximately east of Bridport. It flows westnorthwest through the villages of Askerswell (to which it gives its name), Uploders (where many cottages have gardens backing onto the river) and Loders. Here it heads west towards Bradpole, where it is joined by the small Mangerton River flowing in from the north. It then flows southwest into Bridport, passing underneath the A3066 and B3162 roads in the town. In this section there are weirs and fish ladders. South of the B3162, between Bridport and Bothenhampton, the river also forms the western boundary of the Askers Meadow Nature Reserve, which was designated a Local Nature Reserve in 2004. The river then flows under the B3157 road and joins the River Brit beside Palmers Brewery in the south of the town.