Stars within 20 light-years of 40 Leonis:
Catalogue Astrographique +22°214-129: 3.41797 light-years, class M0e V
39 Leonis: 6.83987 light-years, class F8w Vb
Eggen/Greenstein white dwarf 252: 8.37807 light-years, class DC7 wd
Ross 89: 13.0561 light-years, class M0 V
Bonner Durchmusterung +15°2276: 13.0631 light-years, class G8 V?
Regulus: 13.2329 light-years, class B7 V
Eggen/Greenstein white dwarf 69: 14.2814 light-years, class DA6 wd
Bonner Durchmusterung +14°2097: 16.3151 light-years, class G5
Bonner Durchmusterung +26°2184: 17.0002 light-years, class K1 V
Delta Leonis: 18.08 light-years, class A4 V
Bonner Durchmusterung +27°1775: 18.2774 light-years, class G9 V
Luyten Palomar 316-604: 18.3053 light-years, class M V-VI
Luyten Two-Tenth 12449: 19.5898 light-years, class K-M
Pi(1) Cancri: 19.8578 light-years