2018 Lilly Diabetes 250

{{Short description|25th race of the 2018 NASCAR Xfinity Series}}

{{Use mdy dates|date=February 2025}}

{{Infobox NASCAR race report

| Type = CUST

| Description = Race 25 of 33 in the 2018 NASCAR Xfinity Series season

| Race_Name = Lilly Diabetes 250

| Details ref = {{cite web|url=https://www.mrn.com/2018/09/04/lilly-diabetes-250-entry-list/|title=Lilly Diabetes 250 Entry List – Indianapolis Motor Speedway – MRN|date=4 September 2018}}{{cite web |url=https://nascar.nbcsports.com/2018/09/07/friday-schedule-for-xfinity-at-indianapolis/ |title=Friday schedule for Xfinity at Indianapolis |last=McFadin |first=Daniel |date=September 7, 2018 |access-date=September 7, 2018}}

| Fulldate = {{Start date|2018|09|10}}

| Year = 2018

| Image = Indianapolis Oval.svg

| Caption =

| Location = Indianapolis Motor Speedway in Speedway, Indiana

| Course_mi = 2.5

| Course_km = 4

| Distance_laps = 100

| Distance_mi = 250

| Distance_km = 400

| Weather =

| Avg = {{convert|112.038|mph|km/h}}

| Pole_Driver = Ryan Blaney

| Pole_Team = Team Penske

| Pole_Time = N/A

| Most_Driver = Justin Allgaier

| Most_Team = JR Motorsports

| Most_laps = 41

| Car = 7

| First_Driver = Justin Allgaier

| First_Team = JR Motorsports

| Network = NBCSN

| Announcers =

| Ratings =

| Radio = PRN

| Booth_Ann =

| Turn_Ann =

}}

The 2018 Lilly Diabetes 250 was a NASCAR Xfinity Series race held on September 10, 2018 at Indianapolis Motor Speedway in Speedway, Indiana.{{cite web |url=https://nascar.nbcsports.com/2018/09/08/nascar-postpones-xfinity-race-to-monday-cup-race-moved-up-an-hour-sunday/ |title=NASCAR postpones Xfinity race to Monday; Cup race moved up an hour Sunday |last=Long |first=Dustin |date=September 8, 2018 |access-date=September 8, 2018}} Contested over 100 laps on the {{convert|2.5|mi|adj=on}} speedway, it was the 25th race of the 2018 NASCAR Xfinity Series season.