[[File:Preussen-1806.jpg|thumb|Prussia in 1807 (orange) and its territories lost at Tilsit (other colours).]]
The Prussian state was diminished by more than half under the terms of the treatyTreaties of Tilsit, from 5,700 Prussian square miles to 2,800 ({{convert|323408.4|to|158867.28|km2|sqmi|abbr=on}})square miles.<ref name="Sydow 1903 49"/> Compared to the 9.75 million inhabitants the countryPrussia had prior to the treatyTreaties of Tilsit, no more than 4.5 million inhabitants remained within the new boundaries of Prussiathe Prussian state.<ref name="Sydow 1903 49"/>
The state [[revenue]], which formerly amounted to forty million dollars per annumyear, was decreased in a stilleven greater proportion;. theThe ceded provinces were quite rich and fertile, and many millions had been expendedspent on their improvement. Almost all that Prussia had gained by the [[partitions of Poland]] (1772–1795) was taken away from itPrussia. The [[Kingdom of Saxony|Saxony]], a former confederate of Prussia, was the recipient of the provinces; and. Russia, the more powerful of its erstwhile allies, gained territory with a population of 200,000 inhabitants. The following is a tabulation of the territorial and population losses that Prussia sufferedsustained, (withoutbut not accounting for the Prussian acquisitions since 1772), under the terms of the Tilsit treatyTreaties:<ref>''[[The Annual Register#Competing editions|The New annual register]], or General repository of history, politics, and literature: To which is prefixed, theBand History of Knowledge ...'', Published by Printed for G.G.J. and J. Robinson, Pater-noster-Row.,28 (1808. [https://books.google.com/books?id=T3sEAAAAQAAJ&pg=RA2-PA276) p. 276]. See the footnote</ref>
{|class="wikitable"
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!Westphalian possessions{{efn|Some of the Westphalian possessions had been ceded earlier, and no compensation was paid for these losses under the terms of the treaty of Tilsit.}}||Prussian sq. miles||Inhabitants
|- style="text-align:right;"
|align="left"|County of Mark, with Essen, Werden, and Lippstadt, ||51 <small>={{convert|2893.65|km2|sqmi|abbr=on}}</small>||148,000
|