²⁴⁰Es — Unstable · t½ ≈ 6.0 s · Decay: β⁺ → ²⁴⁰Cf · Type: synthetic · Uses: research.
²⁴¹Es — Unstable · t½ ≈ 9.0 s · Decay: β⁺ → ²⁴¹Cf · Type: synthetic · Uses: research.
²⁴²Es — Unstable · t½ ≈ 16.0 s · Decay: β⁺ → ²⁴²Cf · Type: synthetic · Uses: research.
²⁴³Es — Unstable · t½ ≈ 23.0 min · Decay: β⁻ → ²⁴³Fm · Type: synthetic · Uses: research.
²⁴⁴Es — Unstable · t½ ≈ 38.0 min · Decay: β⁻ → ²⁴⁴Fm · Type: synthetic · Uses: research.
²⁴⁵Es — Unstable · t½ ≈ 1.1 h · Decay: β⁻ → ²⁴⁵Fm · Type: synthetic · Uses: research.
²⁴⁶Es — Unstable · t½ ≈ 25.0 min · Decay: β⁻ → ²⁴⁶Fm · Type: synthetic · Uses: research.
²⁴⁷Es — Unstable · t½ ≈ 4.6 min · Decay: β⁻ → ²⁴⁷Fm · Type: synthetic · Uses: research.
²⁴⁸Es — Unstable · t½ ≈ 27.0 min · Decay: β⁻ → ²⁴⁸Fm · Type: synthetic · Uses: research.
²⁴⁹Es — Unstable · t½ ≈ 102 min · Decay: β⁻ → ²⁴⁹Fm · Type: synthetic · Uses: research.
²⁵⁰Es — Unstable · t½ ≈ 8.6 h · Decay: β⁻ → ²⁵⁰Fm · Type: synthetic · Uses: research.
²⁵¹Es — Unstable · t½ ≈ 33.0 h · Decay: β⁻ → ²⁵¹Fm · Type: synthetic · Uses: research.
²⁵²Es — Unstable · t½ ≈ 1.3 y · Decay: α → ²⁴⁸Bk · Type: synthetic · Uses: research, neutron irradiation studies.
²⁵³Es — Unstable · t½ ≈ 20.5 d · Decay: β⁻ → ²⁵³Fm · Type: synthetic · Uses: neutron source in laboratories.
²⁵⁴Es — Unstable · t½ ≈ 275.7 d · Decay: α → ²⁵⁰Bk · Type: synthetic · Uses: nuclear chemistry studies.
²⁵⁵Es — Unstable · t½ ≈ 39.8 d · Decay: β⁻ → ²⁵⁵Fm · Type: synthetic · Uses: research.
²⁵⁶Es — Unstable · t½ ≈ 25.0 min · Decay: β⁻ → ²⁵⁶Fm · Type: synthetic · Uses: research.
²⁵⁷Es — Unstable · t½ ≈ 7.7 d · Decay: α → ²⁵³Bk · Type: synthetic · Uses: research.

Einsteinium — isotope count: 18 total · Stable: none · Unstable: 18.
(Data: IAEA LiveChart, NUBASE2020, ENSDF, Wikipedia “Isotopes of einsteinium.” Notable applications: ²⁵²Es for neutron irradiation, ²⁵³Es in target materials for heavy-element discovery.)