| 2022-11 Vehicle crime. Investigation complete; no suspect identified | |
| 2022-11 Vehicle crime. | Welwyn North (Station) |
| 2022-09 Other theft. | Welwyn North (Station) |
| 2022-09 Criminal damage and arson. | Welwyn North (Station) |
| 2022-09 Vehicle crime. Investigation complete; no suspect identified | |
| 2022-08 Anti-social behaviour. | |
| 2022-08 Vehicle crime. | Welwyn North (Station) |
| 2022-08 Bicycle theft. | Welwyn North (Station) |
| 2022-05 Other theft. | Welwyn North (Station) |
| 2022-04 Criminal damage and arson. | Welwyn North (Station) |
| 2022-03 Violence and sexual offences. | Welwyn North (Station) |
| 2022-03 Violence and sexual offences. Unable to prosecute suspect | Woodside Road |
| 2022-02 Public order. | Welwyn North (Station) |
| 2022-01 Robbery. | Welwyn North (Station) |
| 2022-01 Anti-social behaviour. | Colyer Close |
| 2021-12 Bicycle theft. | Welwyn North (Station) |
| 2021-11 Violence and sexual offences. Status update unavailable | Woodside Road |
| 2021-10 Vehicle crime. | Welwyn North (Station) |
| 2021-10 Criminal damage and arson. | Welwyn North (Station) |
| 2021-10 Vehicle crime. Investigation complete; no suspect identified | Adele Avenue |
| 2021-08 Burglary. Investigation complete; no suspect identified | Adele Avenue |
| 2021-08 Bicycle theft. | Welwyn North (Station) |
| 2021-08 Vehicle crime. Investigation complete; no suspect identified | Woodside Road |
| 2021-06 Criminal damage and arson. | Welwyn North (Station) |
| 2021-04 Bicycle theft. | Welwyn North (Station) |
| 2021-04 Bicycle theft. Status update unavailable | Parking Area |
| 2021-03 Other crime. Court result unavailable | Parking Area |
| 2021-02 Violence and sexual offences. | Welwyn North (Station) |
| 2021-02 Theft from the person. | Welwyn North (Station) |
| 2021-01 Public order. | Welwyn North (Station) |
| 2020-11 Criminal damage and arson. | Welwyn North (Station) |
| 2020-11 Other theft. | Welwyn North (Station) |
| 2020-10 Violence and sexual offences. | Welwyn North (Station) |
| 2020-10 Criminal damage and arson. | Welwyn North (Station) |
| 2020-10 Bicycle theft. | Welwyn North (Station) |
| 2020-09 Violence and sexual offences. | Welwyn North (Station) |
| 2020-09 Public order. | Welwyn North (Station) |
| 2020-09 Public order. Status update unavailable | Parking Area |
| 2020-09 Violence and sexual offences. Status update unavailable | Parking Area |
| 2020-08 Violence and sexual offences. Unable to prosecute suspect | Woodside Road |
| 2020-08 Violence and sexual offences. Unable to prosecute suspect | Woodside Road |
| 2020-07 Anti-social behaviour. | Parking Area |
| 2020-07 Anti-social behaviour. | Adele Avenue |
| 2020-07 Bicycle theft. | Welwyn North (Station) |
| 2020-06 Other theft. | Welwyn North (Station) |
| 2020-05 Bicycle theft. | Welwyn North (Station) |
| 2020-05 Violence and sexual offences. Court result unavailable | Foxley Grove |
| 2020-04 Anti-social behaviour. | Foxley Grove |
| 2020-04 Burglary. Investigation complete; no suspect identified | Adele Avenue |
| 2020-04 Burglary. Unable to prosecute suspect | Adele Avenue |
| 2020-02 Other theft. Unable to prosecute suspect | Parking Area |
| 2020-02 Violence and sexual offences. Court result unavailable | Parking Area |
| 2019-12 Violence and sexual offences. Status update unavailable | Parking Area |
| 2019-12 Burglary. Court result unavailable | Adele Avenue |
| 2019-10 Violence and sexual offences. Status update unavailable | Cob Lane Close |
| 2019-09 Other theft. | Welwyn North (Station) |
| 2019-08 Bicycle theft. | Welwyn North (Station) |
| 2019-08 Bicycle theft. | Welwyn North (Station) |
| 2019-08 Criminal damage and arson. | Welwyn North (Station) |
| 2019-08 Anti-social behaviour. | Parking Area |
| 2019-08 Violence and sexual offences. Unable to prosecute suspect | Colyer Close |
| 2019-07 Bicycle theft. Status update unavailable | Parking Area |
| 2019-07 Criminal damage and arson. Investigation complete; no suspect identified | Colyer Close |
| 2019-07 Bicycle theft. | Welwyn North (Station) |
| 2019-06 Burglary. Investigation complete; no suspect identified | Cob Lane Close |
| 2019-06 Vehicle crime. Investigation complete; no suspect identified | Cob Lane Close |
| 2019-06 Vehicle crime. Investigation complete; no suspect identified | Cob Lane Close |
| 2019-06 Bicycle theft. | Welwyn North (Station) |
| 2019-06 Vehicle crime. Status update unavailable | Foxley Grove |
| 2019-06 Other crime. Offender given a caution | Foxley Grove |
| 2019-05 Anti-social behaviour. | Colyer Close |
| 2019-05 Bicycle theft. Status update unavailable | Parking Area |
| 2019-05 Other theft. Investigation complete; no suspect identified | Adele Avenue |
| 2019-04 Criminal damage and arson. Investigation complete; no suspect identified | Adele Avenue |
| 2019-04 Bicycle theft. | Welwyn North (Station) |
| 2019-04 Anti-social behaviour. | Woodside Road |
| 2019-04 Other theft. Investigation complete; no suspect identified | Woodside Road |
| 2019-03 Anti-social behaviour. | Foxley Grove |
| 2019-03 Violence and sexual offences. Unable to prosecute suspect | Foxley Grove |
| 2019-03 Bicycle theft. Status update unavailable | Parking Area |
| 2019-03 Vehicle crime. Investigation complete; no suspect identified | Adele Avenue |
| 2019-02 Bicycle theft. | Welwyn North (Station) |
| 2019-01 Burglary. Investigation complete; no suspect identified | Woodside Road |
| 2019-01 Other theft. Investigation complete; no suspect identified | Colyer Close |
| 2018-12 Bicycle theft. | Welwyn North (Station) |
| 2018-12 Criminal damage and arson. | Welwyn North (Station) |
| 2018-12 Other theft. | Welwyn North (Station) |
| 2018-11 Anti-social behaviour. | Colyer Close |
| 2018-11 Bicycle theft. Under investigation | Parking Area |
| 2018-09 Criminal damage and arson. Investigation complete; no suspect identified | Foxley Grove |
| 2018-09 Criminal damage and arson. Investigation complete; no suspect identified | Foxley Grove |
| 2018-09 Bicycle theft. | Welwyn North (Station) |
| 2018-06 Vehicle crime. Investigation complete; no suspect identified | Adele Avenue |
| 2018-06 Burglary. Investigation complete; no suspect identified | Foxley Grove |
| 2018-06 Vehicle crime. Investigation complete; no suspect identified | Foxley Grove |
| 2018-06 Vehicle crime. Investigation complete; no suspect identified | Foxley Grove |
| 2018-06 Vehicle crime. Investigation complete; no suspect identified | Parking Area |
| 2018-06 Vehicle crime. Investigation complete; no suspect identified | Parking Area |
| 2018-06 Vehicle crime. Investigation complete; no suspect identified | Cob Lane Close |
| 2018-05 Anti-social behaviour. | Colyer Close |
| 2018-04 Anti-social behaviour. | Adele Avenue |
| 2018-03 Public order. | Welwyn North (Station) |
| 2018-03 Violence and sexual offences. Unable to prosecute suspect | Woodside Road |
| 2018-03 Vehicle crime. Investigation complete; no suspect identified | Foxley Grove |
| 2018-01 Anti-social behaviour. | Colyer Close |
| 2018-01 Violence and sexual offences. Unable to prosecute suspect | Parking Area |
| 2018-01 Public order. | Welwyn North (Station) |
| 2017-11 Other theft. Investigation complete; no suspect identified | Cob Lane Close |
| 2017-10 Other crime. | Welwyn North (Station) |
| 2017-09 Other theft. | Welwyn North (Station) |
| 2017-09 Anti-social behaviour. | Parking Area |
| 2017-07 Vehicle crime. Investigation complete; no suspect identified | Cob Lane Close |
| 2017-07 Burglary. Investigation complete; no suspect identified | Foxley Grove |
| 2017-07 Public order. | Welwyn North (Station) |
| 2017-06 Anti-social behaviour. | Parking Area |
| 2017-04 Vehicle crime. | Welwyn North (Station) |
| 2017-04 Anti-social behaviour. | Adele Avenue |
| 2017-04 Anti-social behaviour. | Adele Avenue |
| 2017-03 Vehicle crime. Investigation complete; no suspect identified | Colyer Close |
| 2017-03 Burglary. Investigation complete; no suspect identified | Foxley Grove |
| 2017-02 Anti-social behaviour. | Colyer Close |
| 2017-02 Anti-social behaviour. | Parking Area |
| 2016-12 Anti-social behaviour. | Parking Area |
| 2016-11 Vehicle crime. | Welwyn North (Station) |
| 2016-10 Anti-social behaviour. | Adele Avenue |
| 2016-10 Violence and sexual offences. Investigation complete; no suspect identified | Foxley Grove |
| 2016-10 Violence and sexual offences. Unable to prosecute suspect | Foxley Grove |
| 2016-08 Anti-social behaviour. | Foxley Grove |
| 2016-08 Other theft. | Welwyn North (Station) |
| 2016-08 Violence and sexual offences. | Welwyn North (Station) |
| 2016-07 Public order. | Welwyn North (Station) |
| 2016-07 Vehicle crime. | Welwyn North (Station) |
| 2016-05 Public order. | Welwyn North (Station) |
| 2016-05 Public order. | Welwyn North (Station) |
| 2016-04 Bicycle theft. | Welwyn North (Station) |
| 2016-04 Violence and sexual offences. | Welwyn North (Station) |
| 2016-03 Anti-social behaviour. | Cob Lane Close |
| 2016-03 Burglary. Investigation complete; no suspect identified | Cob Lane Close |
| 2016-03 Burglary. Investigation complete; no suspect identified | Foxley Grove |
| 2016-01 Violence and sexual offences. | Welwyn North (Station) |