In 2015, LEGO released 41 City sets across 10 subthemes, all of these sets have been retired. Subthemes for that year included Beach, Construction, Deep Sea Explorers, Fire, Seasonal, Space Port, Swamp Police, Traffic, Trains, and Value Packs. For that year, the total price of all retail sets cost $1,950, today those sets are valued around $3,394, a growth of 74%.
Most valuable 2015 LEGO City set
60098 Heavy-Haul Train $396.17
Highest growth 2015 City set
60085 4x4 with Powerboat +200.07%
Largest 2015 LEGO City set
60097 City Square 1,683 pieces
Most owned 2015 City set
60073 Service Truck
41 sets

30311 Swamp Police Helicopter

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 51 / 1
Availability Retired
30311 LEGO City Swamp Police Helicopter
Retail $3.49
Value $6.69
Growth  +91.7%
Annual growth 5.3%

30312 Demolition Driller

Theme / Subtheme City / Construction
Year 2015
Pieces / Minifigs 40 / 1
Availability Retired
30312 LEGO City Construction Demolition Driller
Retail $4.99
Value $8.34
Growth  +67.1%
Annual growth 3.0%

30313 Garbage Truck

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 48 / 1
Availability Retired
30313 LEGO City Garbage Truck
Retail $3.49
Value $7.64
Growth  +118.9%
Annual growth 4.7%

30314 Go-Kart Racer

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 45 / 1
Availability Retired
30314 LEGO City Go-Kart Racer
Retail $4.99
Value $7.81
Growth  +56.5%
Annual growth 4.0%

30315 Space Utility Vehicle

Theme / Subtheme City / Space Port
Year 2015
Pieces / Minifigs 37 / 1
Availability Retired
30315 LEGO City Space Utility Vehicle
Retail $3.99
Value $9.31
Growth  +133.3%
Annual growth 10.1%

60065 ATV Patrol

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 59 / 2
Availability Retired
60065 LEGO City Swamp Police ATV Patrol
Retail $6.99
Value $13.99
Growth  +100.1%
Annual growth 5.5%

60066 Swamp Police Starter Set

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 78 / 4
Availability Retired
60066 LEGO City Swamp Police Starter Set
Retail $9.99
Value $20.15
Growth  +101.7%
Annual growth 4.8%

60067 Helicopter Pursuit

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 253 / 3
Availability Retired
60067 LEGO City Swamp Police Helicopter Pursuit
Retail $39.99
Value $47.40
Growth  +18.5%
Annual growth 2.3%

60068 Crooks' Hideout

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 473 / 5
Availability Retired
60068 LEGO City Swamp Police Crooks' Hideout
Retail $69.99
Value $91.30
Growth  +30.4%
Annual growth 2.8%

60069 Swamp Police Station

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 707 / 6
Availability Retired
60069 LEGO City Swamp Police Station
Retail $89.99
Value $169.99
Growth  +88.9%
Annual growth 5.8%

60070 Water Plane Chase

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 263 / 2
Availability Retired
60070 LEGO City Swamp Police Water Plane Chase
Retail $29.99
Value $44.52
Growth  +48.4%
Annual growth 2.8%

60071 Hovercraft Arrest

Theme / Subtheme City / Swamp Police
Year 2015
Pieces / Minifigs 331 / 3
Availability Retired
60071 LEGO City Swamp Police Hovercraft Arrest
Retail $44.99
Value $69.99
Growth  +55.6%
Annual growth 2.7%

60072 Demolition Starter Set

Theme / Subtheme City / Construction
Year 2015
Pieces / Minifigs 85 / 4
Availability Retired
60072 LEGO City Construction Demolition Starter Set
Retail $9.99
Value $17.31
Growth  +73.3%
Annual growth 4.2%

60073 Service Truck

Theme / Subtheme City / Construction
Year 2015
Pieces / Minifigs 233 / 2
Availability Retired
60073 LEGO City Construction Service Truck
Retail $24.99
Value $63.18
Growth  +152.8%
Annual growth 5.5%

60074 Bulldozer

Theme / Subtheme City / Construction
Year 2015
Pieces / Minifigs 384 / 2
Availability Retired
60074 LEGO City Construction Bulldozer
Retail $39.99
Value $77.20
Growth  +93.0%
Annual growth 7.9%

60075 Excavator and Truck

Theme / Subtheme City / Construction
Year 2015
Pieces / Minifigs 311 / 2
Availability Retired
60075 LEGO City Construction Excavator and Truck
Retail $49.99
Value $104.97
Growth  +110.0%
Annual growth 6.0%

60076 Demolition Site

Theme / Subtheme City / Construction
Year 2015
Pieces / Minifigs 776 / 5
Availability Retired
60076 LEGO City Construction Demolition Site
Retail $89.99
Value $195.05
Growth  +116.7%
Annual growth 4.6%

60077 Space Starter Set

Theme / Subtheme City / Space Port
Year 2015
Pieces / Minifigs 107 / 4
Availability Retired
60077 LEGO City Space Starter Set
Retail $9.99
Value $20.01
Growth  +100.3%
Annual growth 5.4%

60078 Utility Shuttle

Theme / Subtheme City / Space Port
Year 2015
Pieces / Minifigs 155 / 2
Availability Retired
60078 LEGO City Utility Shuttle
Retail $24.99
Value $49.65
Growth  +98.7%
Annual growth 4.3%

60079 Training Jet Transporter

Theme / Subtheme City / Space Port
Year 2015
Pieces / Minifigs 448 / 3
Availability Retired
60079 LEGO City Training Jet Transporter
Retail $49.99
Value $71.03
Growth  +42.1%
Annual growth 3.1%

60080 Spaceport

Theme / Subtheme City / Space Port
Year 2015
Pieces / Minifigs 586 / 5
Availability Retired
60080 LEGO City Spaceport
Retail $119.99
Value $179.99
Growth  +50.0%
Annual growth 3.7%

60081 Pickup Tow Truck

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 209 / 2
Availability Retired
60081 LEGO City Pickup Tow Truck
Retail $19.99
Value $41.87
Growth  +109.5%
Annual growth 9.0%

60082 Dune Buggy Trailer

Theme / Subtheme City / Beach
Year 2015
Pieces / Minifigs 222 / 2
Availability Retired
60082 LEGO City Beach Dune Buggy Trailer
Retail $19.99
Value $32.16
Growth  +60.9%
Annual growth 3.0%

60083 Snowplough Truck

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 196 / 1
Availability Retired
60083 LEGO City Snowplough Truck
Retail $19.99
Value $54.45
Growth  +172.4%
Annual growth 11.2%

60084 Racing Bike Transporter

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 178 / 2
Availability Retired
60084 LEGO City Racing Bike Transporter
Retail $19.99
Value $44.89
Growth  +124.6%
Annual growth 6.8%

60085 4x4 with Powerboat

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 301 / 2
Availability Retired
60085 LEGO City 4x4 with Powerboat
Retail $29.99
Value $89.99
Growth  +200.1%
Annual growth 8.1%

60086 LEGO City Starter Set

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 242 / 5
Availability Retired
60086 Traffic LEGO City Starter Set
Retail $29.99
Value $37.82
Growth  +26.1%
Annual growth 2.5%

60088 Fire Starter Set

Theme / Subtheme City / Fire
Year 2015
Pieces / Minifigs 92 / 4
Availability Retired
60088 LEGO City Fire Starter Set
Retail $9.99
Value $15.05
Growth  +50.7%
Annual growth 4.3%

60090 Deep Sea Scuba Scooter

Theme / Subtheme City / Deep Sea Explorers
Year 2015
Pieces / Minifigs 42 / 1
Availability Retired
60090 LEGO City Deep Sea Explorers Deep Sea Scuba Scooter
Retail $6.99
Value $18.96
Growth  +171.2%
Annual growth 7.1%

60091 Deep Sea Starter Set

Theme / Subtheme City / Deep Sea Explorers
Year 2015
Pieces / Minifigs 90 / 3
Availability Retired
60091 LEGO City Deep Sea Explorers Deep Sea Starter Set
Retail $9.99
Value $29.70
Growth  +197.3%
Annual growth 5.8%

60092 Deep Sea Submarine

Theme / Subtheme City / Deep Sea Explorers
Year 2015
Pieces / Minifigs 274 / 3
Availability Retired
60092 LEGO City Deep Sea Explorers Deep Sea Submarine
Retail $39.99
Value $69.99
Growth  +75.0%
Annual growth 4.9%

60093 Deep Sea Helicopter

Theme / Subtheme City / Deep Sea Explorers
Year 2015
Pieces / Minifigs 388 / 3
Availability Retired
60093 LEGO City Deep Sea Explorers Deep Sea Helicopter
Retail $49.99
Value $111.08
Growth  +122.2%
Annual growth 7.4%

60095 Deep Sea Exploration Vessel

Theme / Subtheme City / Deep Sea Explorers
Year 2015
Pieces / Minifigs 717 / 7
Availability Retired
60095 LEGO City Deep Sea Explorers Deep Sea Exploration Vessel
Retail $119.99
Value $198.61
Growth  +65.5%
Annual growth 4.0%

60096 Deep Sea Operation Base

Theme / Subtheme City / Deep Sea Explorers
Year 2015
Pieces / Minifigs 907 / 5
Availability Retired
60096 LEGO City Deep Sea Explorers Deep Sea Operation Base
Retail $99.99
Value $148.97
Growth  +49.0%
Annual growth 4.8%

60097 City Square

Theme / Subtheme City / Traffic
Year 2015
Pieces / Minifigs 1,683 / 14
Availability Retired
60097 LEGO Traffic City Square
Retail $189.99
Value $235.86
Growth  +24.1%
Annual growth 2.3%

60098 Heavy-Haul Train

Theme / Subtheme City / Trains
Year 2015
Pieces / Minifigs 984 / 5
Availability Retired
60098 LEGO City Heavy-Haul Train
Retail $199.99
Value $396.17
Growth  +98.1%
Annual growth 9.4%

60099 City Advent Calendar

Theme / Subtheme City / Seasonal
Year 2015
Pieces / Minifigs 278 / 6
Availability Retired
60099 LEGO City Advent Calendar
Retail $29.99
Value $38.67
Growth  +28.9%
Annual growth 1.8%

66521 Demolition Super Pack

Theme / Subtheme City / Value Packs
Year 2015
Pieces 1,393
Availability Retired
66521 LEGO City Demolition Super Pack
Retail $129.99
Value $266.63
Growth  +105.1%
Annual growth 6.2%

66522 Deep Sea Explorers Super Pack 4-in-1

Theme / Subtheme City / Value Packs
Year 2015
Pieces 794
Availability Retired
66522 LEGO City Deep Sea Explorers Super Pack 4-in-1
Retail $129.99
Value $188.54
Growth  +45.0%
Annual growth 4.9%

66523 City Super Pack 3-in-1

Theme / Subtheme City / Value Packs
Year 2015
Pieces 528
Availability Retired
66523 LEGO City Super Pack 3-in-1
Retail $59.99
Value $84.67
Growth  +41.1%
Annual growth 3.5%

Kayak

Theme City
Year 2015
Pieces 18
Availability Retired
LEGO City Kayak
promotional
Value $14.78
Annual growth 6.1%