Goodrich Castle (Herefordshire, England) never had a fixed population—it ebbed and flowed with its role:
~20–50: Garrison (knights, men-at-arms), steward, chaplain, servants. Seasonal.
200–500+: Noble household (lord, lady, children), retainers, knights, squires, clerks, cooks, bakers, brewers, smiths, grooms, falconers, musicians, laundry, gardeners, soldiers. Peak: ~1,000+ for royal visits (Edward I, II).
50–150: Caretaker garrison. 1646: Siege (Parliament vs. Royalists) — ~200 defenders. Surrendered after tunneling/mortars. Slighted (damaged).
0–5: Gamekeeper, tourists. Wordsworth, Turner painted it.
Staff: ~10–20 (English Heritage). Visitors: ~50,000/yr.
Key insight: A castle’s population = its political/military weight. Goodrich peaked when it was a palace-fortress for Marcher lords. Ruin came when artillery made walls obsolete.