ZIP Code 10543

A Westchester ZIP with dollars packed into fewer rows

$18,447,133 divided by 25,078 is about $736 per itemized line. That is a high-mean pattern: fewer Schedule A rows than an $18 million university-town ZIP, more dollars on the typical row. Sound Shore geography does not change the arithmetic. The packet publishes a dollar total and a contribution count. It does not publish a unique-donor count or a party split.

Twenty-five thousand seventy-eight contributions is still a long list by ordinary filing standards. It is not a headcount of Mamaroneck households. Repeat gifts, spouse filings, and redesignations can add rows. Because this packet has no donor figure, 25,078 must be cited as a contribution-line total.

LobbyVault does not treat $18,447,133 as a ranking of Westchester civic virtue. Motive language is out of scope. The source is FEC.gov itemized receipts tagged 10543.

Village mail codes and federal forms

10543 is the ZIP most filers use for Mamaroneck. A committee that lists a Larchmont-adjacent suite, a joint fundraising committee, or a household that files 10543 all post the same five-digit key. $18,447,133 follows the form. It is not a resident-only book.

The 25,078-line count can include memo entries. Open the ZIP 10543 FEC page for named receipts. This guide will not guess which rows are households.

Questions

How much federal campaign money is tied to ZIP 10543?

FEC.gov itemized receipts listing contributor ZIP 10543 total $18,447,133 across 25,078 contributions in the LobbyVault aggregate. That figure is a ZIP roll-up of federal Schedule A rows, not a unique-donor count and not a census of Mamaroneck residents. Unitemized gifts sit outside it. The mean of about $736 is arithmetic from those two packet facts.

How many FEC contributions are tagged to ZIP 10543?

LobbyVault counts 25,078 itemized contributions for ZIP 10543. That is a line count, not a headcount of unique people. Repeat gifts and memo entries can add rows without adding new donors. This packet does not publish a unique-donor figure. The matching dollar total on the same extract is $18,447,133.

Does ZIP 10543 include only Mamaroneck residents?

No. The ZIP is the five-digit contributor code on the FEC itemization. Committees and office addresses that file 10543 can be part of $18,447,133 when that is what was entered. LobbyVault does not recode the field into a residential-only book. Open named receipts on the ZIP hub to see which committees appear.

Where does LobbyVault get ZIP 10543 totals?

The numbers come from FEC.gov itemized contribution aggregates indexed on LobbyVault: $18,447,133 and 25,078 lines for ZIP 10543. Original reports remain on FEC.gov. Unitemized federal gifts and New York State filings are outside both figures. If a later extract disagrees with this snapshot, the Commission’s filing controls.