We explore manganite interface magnetism in epitaxially grown La 0.7 Sr 0.3 MnO 3 ͑LSMO͒ / SrTiO 3 ultrathin superlattices ͑SL͒ along ͑110͒ orientation. We show that robust ferromagnetism persists down to 4 monolayers ͑MLs͒ LSMO ͑ϳ1.1 nm in thickness͒, of which 50% Mn is at the interface state. Above 8 MLs, the magnetic moment is nearly saturated to the theoretical value of 3.7 B with an estimated interface moment of 3.2 B . In comparison to ͑100͒-oriented SLs which were previously shown to have a spin-canted ground state, ͑110͒oriented SLs exhibit stronger low-dimensional ferromagnetism and better metallicity, suggesting a ferromagnetic-interface spin state well suited for all-oxide spintronic devices. The underlining mechanism is qualitatively discussed.