Data from the National Police Headquarters. Since 2013 data to the level of powiats. Since 2013, crime detection rates are calculated excluding statistical information on their own investigations of prosecutor and investigations assigned to conduct the authorized agencies other than the police, as well as with limited information about the activities of juvenile offenses and therefore are not fully comparable with the rates from previous years. Data about ascertained crimes since 2014 do not include punishable acts committed by juveniles; in accordance with the amended methodology, the specification of the number of juveniles committing punishable acts takes place during court proceedings after the Police provides records in juvenile cases to the family court. Indicators relating to the number and structure of the population (gender, age group) since 2010 have been recalculated in accordance with the balance sheet prepared on the basis of the results of the National Census 2011. Indicators relating to the number and structure of the population (gender, age group) since 2020 have been recalculated in accordance with the balance sheet prepared on the basis of the results of the National Census 2021.

Data from the Police Headquarters. An ascertained crime is an event, which after the completion of preparatory proceedings was confirmed as a crime. Crime - in connection with the Criminal Code of 1997 - is a felony or misdemeanour prosecuted upon by public accusation or private accusation, in connection with the Penal Fiscal Code - is a fiscal offence. The rate of detectability of delinquents is the relation of the number of detected crimes in a given year (including those detected after resumption following discontinuance) to the total number of crimes ascertained in a given year, plus the number of crimes recorded in commenced proceedings and discontinued in previous years due to undetected delinquents.In accordance with Decision No. 314 of the Chief of Police of 7 October 2024 regarding the establishment of a team to develop proposals for amending groups of legal acts used in the Analytical System and the concept of assigning legal classifications within the Police organization, new groups of legal classifications as well as new Temida article details have been created, effective from 1 January 2025. When comparing groups of legal classifications, it should be noted that the content of the newly created groups differs from the groups of legal classifications that were in force until 31 December 2024 (the exception being the Full Catalogue of Offences, which in both cases contains all criminal provisions). This results, among other things, from the updating of many articles with new Temida details, the reallocation of classifications between groups, as well as the creation of a previously non-existent group “Cybercrime”. Since January of this year, the following groups have been in place: Criminal, Commercial, Corruption, Traffic, Cybercrime, Other offences, Violence and assault, Property theft, Automobile theft and burglary, Burglary, Robbery, Theft and assault and criminal coercion, Homicide, Rape, and the Act on Counteracting Drug Addiction. Groups: “Criminal”, “Commercial”, “Corruption”, “Traffic”, “Cybercrime” and “Others” constitute the sum of the “Full Catalogue of Offences”.