¹³⁸Dy — Unstable · t½ ≈ 200 ms · Decay: β⁺ → ¹³⁸Tb · Type: synthetic · Uses: research.
¹³⁹Dy — Unstable · t½ ≈ 0.5 s · Decay: β⁺ → ¹³⁹Tb · Type: synthetic · Uses: research.
¹⁴⁰Dy — Unstable · t½ ≈ 1.0 s · Decay: β⁺ → ¹⁴⁰Tb · Type: synthetic · Uses: research.
¹⁴¹Dy — Unstable · t½ ≈ 0.9 s · Decay: β⁺ → ¹⁴¹Tb · Type: synthetic · Uses: research.
¹⁴²Dy — Unstable · t½ ≈ 2.3 min · Decay: β⁺ → ¹⁴²Tb · Type: synthetic · Uses: research.
¹⁴³Dy — Unstable · t½ ≈ 2.3 min · Decay: β⁺ → ¹⁴³Tb · Type: synthetic · Uses: research.
¹⁴⁴Dy — Unstable · t½ ≈ 3.0 min · Decay: β⁺ → ¹⁴⁴Tb · Type: synthetic · Uses: research.
¹⁴⁵Dy — Unstable · t½ ≈ 5.8 min · Decay: β⁺ → ¹⁴⁵Tb · Type: synthetic · Uses: research.
¹⁴⁶Dy — Unstable · t½ ≈ 2.3 d · Decay: β⁻ → ¹⁴⁶Ho · Type: activation product · Uses: tracer.
¹⁴⁷Dy — Unstable · t½ ≈ 8.0 min · Decay: β⁺ → ¹⁴⁷Tb · Type: synthetic · Uses: research.
¹⁴⁸Dy — Unstable · t½ ≈ 3.0 min · Decay: β⁺ → ¹⁴⁸Tb · Type: synthetic · Uses: research.
¹⁴⁹Dy — Unstable · t½ ≈ 4.0 min · Decay: β⁺ → ¹⁴⁹Tb · Type: synthetic · Uses: research.
¹⁵⁰Dy — Unstable · t½ ≈ 3.0 min · Decay: β⁺ → ¹⁵⁰Tb · Type: synthetic · Uses: research.
¹⁵¹Dy — Unstable · t½ ≈ 17.9 min · Decay: β⁺ → ¹⁵¹Tb · Type: synthetic · Uses: research.
¹⁵²Dy — Unstable · t½ ≈ 2.3 h · Decay: β⁺ → ¹⁵²Tb · Type: synthetic · Uses: research.
¹⁵³Dy — Unstable · t½ ≈ 6.4 h · Decay: β⁻ → ¹⁵³Ho · Type: synthetic · Uses: research.
¹⁵⁴Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁵⁵Dy — Unstable · t½ ≈ 9.9 h · Decay: β⁻ → ¹⁵⁵Ho · Type: synthetic · Uses: research.
¹⁵⁶Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁵⁷Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁵⁸Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁵⁹Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶⁰Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶¹Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶²Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶³Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶⁴Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶⁵Dy — Unstable · t½ ≈ 2.3 h · Decay: β⁻ → ¹⁶⁵Ho · Type: synthetic · Uses: research.
¹⁶⁶Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶⁷Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶⁸Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁶⁹Dy — Unstable · t½ ≈ 2.3 d · Decay: β⁻ → ¹⁶⁹Ho · Type: synthetic · Uses: tracer.
¹⁷⁰Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁷¹Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁷²Dy — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁷³Dy — Unstable · t½ ≈ 3.4 h · Decay: β⁻ → ¹⁷³Ho · Type: synthetic · Uses: research.

Dysprosium — isotope count: 36 total · Stable: 7 (¹⁵⁶Dy, ¹⁵⁸Dy, ¹⁶⁰Dy, ¹⁶¹Dy, ¹⁶²Dy, ¹⁶³Dy, ¹⁶⁴Dy, ¹⁶⁶Dy, ¹⁶⁷Dy, ¹⁶⁸Dy, ¹⁷⁰Dy, ¹⁷¹Dy, ¹⁷²Dy) · Unstable: 23.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; notable applications: Dy isotopes in neutron-absorbing alloys for reactor control, isotope tracers, and materials science.)