Neil MacKenzie grabbed the only goal as draw specialists Notts County finally recorded their first win of the season.
In a poor first half, Jason Lee had the best chance but his header was turned away by Daggers keeper Tony Roberts.
Substitute MacKenzie had only been on the pitch for 10 minutes when Spencer Weir-Daley headed down, and he finished from eight yards after 83 minutes.
Shane Huke had Dagenham's best chance but he volleyed wide from a corner as County held on in stoppage time.
Notts County: Pilkington, Canoville, Tann, Hunt, Mayo, Smith (Silk 78), Somner, Butcher (MacKenzie 73), Lee, Dudfield (Sam 87), Weir-Daley.
Subs Not Used: Sandercombe, McCann.
Booked: Canoville, Lee.
Goals: MacKenzie 83.
Dag & Red: Roberts, Foster , Smith, Uddin, Griffiths, Saunders, Southam, Sloma, Rainford, Strevens (Huke 79), Moore.
Subs Not Used: Thompson, Green, Patterson, Rochester.
Booked: Smith, Saunders.
Ref: Neil Swarbrick (Lancashire).