1. Start with the New Castle service area, not a population assumption
Your firm may serve clients in New Castle, elsewhere in Lawrence County or both. Those boundaries should be explicit before anyone decides how inquiries are routed or how reporting is grouped. The Census record identifies New Castle as a municipality in Lawrence County and reports a 2020–2024 ACS 5-year population estimate of 21,579, with a margin of error of 42. That is eligibility and geographic context only. It cannot establish how many people need legal help, how many will contact your firm or how much staff coverage you require.
Recommended approach
List the locations your firm actually serves, then review whether location should affect ownership, urgency rules, consultation availability or reporting. Keep New Castle and Lawrence County distinct in internal measurement when that distinction helps you understand the intake path.
